When VA is disabled and the normal DevStudio.2003 assist listbox is "opened" (poped up) in C#, if you click the toolbar to reenable VA, it crashes DevStudio.
May be related but this one occurs immediately on clicking on enable VAX. You don't need to select the view. It crashes throwing up an exception error rather than exiting silently as the other issue reported.
I assume with "assist listbox" you mean the intellisense list which you get when typing . after a class instance or which you can reopen by pressing Ctrl-Space?
I don't see this behaviour here: VS.Net 2003 + VAX 1223. I can use the toolbar or my short cut to toggle VAX on and off with no crash at all while the intellisense list is open - I have to reopen the list because it is close on enable/disable.
Can you add more details to what you do - any other addins installed?