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What's New, SR5b (19-May-2006)
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Bug Fixes:

• DWG & DXF Import and Export have had several bugs fixed.
• External automation did not work in Rhino 3.0 SR5. This is fixed.
• Hardware lock: Changes were made to the resolve the problem of Rhino 3.0 running on 64-bit Windows.

• STEP Import did not ask to scale geometry if the unit system of the STEP file was different from the unit system of the Rhino Model. This is fixed.

• Export DWG/DXF: Now exports Polyline vertices on the same layer as the Polyline.
• File I/O: All commands that open or save files, now store the file preference.
• Open: DWG/DXF: MLines are now imported.
• Support for NT4: As of Rhino 3.0 service release 5, full support for Windows NT 4.0, will no longer be provided.

• DXF Export to E's Japanese CAD application works better.
• Convert toolbar button fixed to work in localized versions of Rhino.
• Copy command: Copying dimension points crashed Rhino. This is fixed.
• DWG/DXF Export: Text is now exported as TEXT instead of MTEXT
• DWG/DXF Export: Project to CPlane option now projects to the CPlane in the active view instead of the World Top CPlane.
• DWG/DXF Import: Correctly exports meshes as 3D Faces.
• EPS files can now be opened by Rhino.
• Export DWG/DXF: The EXTMIN and EXTMAX variables in the header are now set to the extents of the geometry.
• Extrude command: Circles extruded with the Taper option crash when extruded beyond the point where the extrusion intersects itself.
• False Color Display: Zebra, CurvatureAnalysis, etc., did not properly mesh the objects. This is fixed.
• Import: DXF: Some DXF files from Prosurf caused Rhino to crash on import. This is now fixed.
• Installer: The patch installer now removes previously installed Rhino 3.0 listings from the Add and Remove programs list.
• License Manager: A few computers required that a CD-Key be entered every time Rhino starts. This is now fixed.
• License Manager: An uncommon bug caused network license conflicts for network node installations. The symptom is that the same license is retrieved from the ZOO by two different computers, and the second computer refuses to run Rhino because the license is already in use. This is now fixed.
• Open: DWG/DXF: Several bugs fixed reading and saving files.
• Open:STEP: Duplicate objects were incorrectly created when reading some STEP files. This is now fixed.
• Print command: On the drop-down scale list, the item that reads 3/4" = 1'-0" incorrectly scaled by 1:26. It now correctly scales by 1:16.
• Rhino 3.0 will now warn you if it tries to read Rhino 4.0 Toolbar files.
• Save:STL: Refine setting now on by default.
• SelDup command:  Incorrectly selected text that was not a duplicate. This is now fixed.
• Toolbars: Rhino sometimes would open without toolbars. This was caused by Rhino failing to save toolbar information before a new session of Rhino tried to read it. More checks are in place to prevent this condition.

• Bonus Tools are now included in Service Release 4.
• Dimension display: A new document property controls whether dimension text is displayed horizontal in each viewport.
• Help command: The help file in all languages now remembers the size and location and reopens in that position.
• Open 3DM: File Locking - when a file is in use by one user, it can only be opened in read-only mode by another user.

• EditScript command: New dialog box layout.
• RhinoMail command: Scriptable options added.

• Align command: Problem with edge alignment fixed.
• BoundaryExtrude command: Preselection of surfaces is now permitted.
• BoundingBox command: The BoundingBox command failed on some curves. This is fixed.
• CreateUVCrvOnSrf command: Instead of cancelling the selection when you pre-select one surface and at least one curve, the command will try to create the uv curves. If anything else is pre-selected, then all is unselected and post-selection begins.
• Delete: Invisible bad objects in the file could be selectable by SelAll or SelBadObjects but it did not respond to Delete. This is fixed.
• Download Page now works correctly with Mozilla FireFox.
• EditScript command: Dialog box now remembers previous size and location.
• EditScript command: A new "Close" item on the File menu closes the window but saves the current text during the Rhino session.
• ExtractControlPolygon command: Failed on surfaces with singularities. This is fixed.
• FilletPolyline command: If segments are too small to be filleted, a message displays.
• Fin and OffsetNormal commands: Now allow pre-picking curves.
• Fin command: Now works with a curve preselected and only prompts for the surface.
• Import STEP: fixed a bug that caused Rhino to fail to read files with incorrectly formatted schema names.
• Installer: Fixed several bugs related to patching existing installations of Bonus Tools and other plug-ins.
• Layout command: Running the Layout command in Windows ME caused a crash. This is fixed.
  
• License Manager: License conflicts occurred during time-consuming tasks such as loading a large file. This is fixed.
• MoveEdge command: The VectorDirection and PlaneDirection prompts have been removed.
• MoveEdge command: The prompts have been tuned up.
• Pipe command: Making a thick pipe with both start radii the same crashed Rhino. This is fixed.
• Plane: The Plane command will no longer accept zero length or width input.
• PopUpMenu command: The PopUpMenu command opened the menu, but failed to execute the command. This is fixed.
• Properties: Crash when changing renderers has been fixed.
• Scale1D command: Made a bad object when scaling a cylinder along its axis. This is fixed.
• SplitFace command: Using the Near object snap to split the face caused the wrong face to be split. This is fixed.
• STEP: Several import bugs have been fixed.
• Undo command: Commands that delete large numbers of objects now undo more quickly. 
• VRBSrf command: Crashed when making blend with 0 radius at both ends. This is fixed. 
• Worksession command: Attaching non-Rhino files such as DWG, LWO, OBJ, to Worksession incorrectly caused the attached file to become active. This is fixed. 
• Zoo: Several problems with the Zoo license manager have been fixed.

• ArrayCrv: A flaw that caused inaccurate spacing has been fixed.
• Audit3dmFile: A new option AuditPlugInData to audit plugin data has been added.
• BoundingBox: Failed with curves and text. This is fixed.
• ChangeLayer: Changing an object to a locked layer incorrectly displayed the object as selected. This is fixed.
• ClosestPt: A crash bug with a curve on the surface and the surface has been fixed.
• Contour: A crash occurred when a face in a polysurface was selected as input. This is fixed.
• Digitize: Romer digitizer only allowed point probes. This is fixed.
• DupBorder: Did not pay attention to the surface normal.
• Endpoint osnap: The Endpoint object snap failed on corners of kinked single surfaces and curves. This is fixed.
• ExtrudeCrv: Solid tapered extrude with sharp corners created a bad object. This is fixed.
• Fillet: Filleting with radius 0 created unexpected results in some cases. This is fixed.
• Fin: A lockup bug has been fixed.
• IGES Import: The units were not being properly set when a file was imported. This is fixed.
• Import OBJ: Importing FormZ Mac files caused a crash. This is fixed.
• Import: Drag and Drop did not prompt for a scale change. This is fixed.
• Layer dialog box: A crash when dragging the layer dialog box has been fixed.
• Layout: A crash bug and other more minor problems have been fixed.
• License Manager: A problem with low-level user checking out licenses has been fixed.
• Make2D: A crash bug has been fixed.
• Make2D: A crash when using Blocks has been fixed.
• Mesh: The Weld control has been removed. Welding did not do anything, but the control was still there.
• Open OBJ: Failed on Windows 98. This has been fixed.
• Patch: Failed with AutomaticTrim through a group of points. This is fixed.
• Patch: In cases using curves with Automatic Trim on failed. This is fixed.
• Save SLC: Resulting file caused crash in Modelworks. This is fixed. 
• Save, SaveAs, Export: A new scripting option SavePlugInData has been added. Set to No to save the Rhino file with no plug-in data attached.
• Split: Several crash bugs have been fixed.
• Surface editing: A problem that was adding unnecessary distortion during control point dragging has been fixed.
• -Sweep2: The Closed option of the scriptable version of Sweep2 failed. This is fixed.
• TextObject: A crash with the Graphos font has been fixed.
• Toolbars: A problem with toolbars disappearing after installation of SR3 has been fixed.
• Toolbars: Tapered extrude added to Extrude toolbars.
• Trim: Scripting the AutomaticTrim option did not work properly. This is fixed.
• UnrollSrf: A bug that created a bad object has been fixed.
• UnrollSrf: An accuracy problem has been fixed.
• UnrollSrf: New command line option to display difference in area.
• Weld: It was not possible to weld selected mesh vertices like V2. This is fixed in MeshTools.

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