Problem: ArcMap crashes when editing multipart features in Sketch Properties dialog
This problem is addressed in ArcGIS 8.1 Service Pack 1. See Related Information section to download this pack.
Selecting part of a multipart feature in the Edit Sketch Properties dialog box after editing the vertex of a previous part may cause ArcMap to crash.
If you change a vertex value and then click a different part before pressing the Enter key, ArcMap may crash.
Solution or Workaround
Press the Enter key after modifying a vertex' X, Y, Z, or M value.