a jednak... SR5b
* AlignMeshVertices: Pressing Esc incorrectly completed the command instead of exiting. This is fixed.
* Circle: Crash with SmartTrack fixed.
* Extend: Crash fixed.
* Import:STEP: Crash when file contains extra periods has been fixed.
* Installer: Crash on startup fixed.
* Offset: Crash fixed.
* Open:DWG/DXF: A problem importing regions has been fixed.
* Open crash fixed.
* PlayAnimation: Crash fixed.
* Project crash fixed.
* RemoveEdge: Crash fixed.
* SaveAs crash fixed.
* Split crash fixed.
* Trim crash fixed.
http://download.rhino3d.com/whatsnew.asp?rel=458&language=en