Here is a list of problems I have experienced with VW8.5.1. Some date to earlier versions.
1. Occasionally the 3D selector will pop up and I have to go to the view window and select plan view. I don't use 3D.
2. Sometimes a line cut through another object (circle, square) will cause the line and object to disappear.
3. In Custom Dimension, the cursor cannot be placed in edit fields for circle dimensions. Using the return key will walk it through until it arrives in the circle dimension fields.
4. The program frequently freezes. The clock won't tick. Sometimes it restores itself after minutes, sometimes not.
5. The text window of dimensions is frequently to small and clips the text, both on the window and in printing.
6. The video breaks frequently, showing a barberpole set of stripes diagonally across the field. Drawing windows, dialog boxes, and edit fields may be affected. The video is corrupted for other programs as well - Netscape, WP, Spread sheets. Only goes away on reboot. Have not been able to identify bad video driver, extension conflict, or other cause. Problem not seen before VW 8.5.