[plt-dev] all versions >= 4.1.5.x *very* broken in Windows

At Mon, 18 May 2009 14:17:12 -0400, Dave Herman wrote:
> This is pretty critical: on Windows, recent versions of DrScheme are 
> repeatedly freezing. I've sent a couple emails about this, but I'm 
> seeing it more and more since then. I updated to 4.2.0.2 today and it's 
> just as bad or worse.
> 
> It seems to be when DrScheme loses focus-- esp., I think, when part or 
> all of the window needs to be repainted-- and I try to refocus on 
> DrScheme and it won't come back.

I have not been able to recreate the behavior, but I have a guess at
the problem. Can you try the latest pre-release build (as of Tuesday,
May 19 2009, 09:10 EDT)?