title: openGL screensaver causes problems
body: <p>I have an application written in QT4, that uses an openGL window.  It has been running happily for months.  Windows XP, service Pack 3,</p>
  
  <p>Recently I was diddling with my screensaver, and happened to select the 3D text choice.  When I previewed it, the QT4 application seg-faulted immediately.  When I ran in the debugger,it is crashing in ig4dev32.dll, which is an intel graphics accelerator driver for Open GL.</p>
  
  <p>When I do a similar test on a machine with an NVIDIA card, I (not surprisingly) get no problems.</p>
  
  <p>I'm not really sure whether I'm asking for help, or insight, or whatever--has anybody ever seen it?  Google tells me others have seen it happen in gaming applications, but I see no references to developers having it happen to them.  Obviously, I can not use that screensaver, but I suspect the problem is "bigger" than that.  Ideas?</p>