osx spaces with disappearing windows

This could alternatively be titled missing spaces. Anyway like many other leopard users, I've run into a little snag with spaces. It seems that it likes to loose random windows, anything from Terminal or Vim to VMware. Not cool. It's not killer, just annoying. I say that because I can still interact with the windows to an extent. I can usually save and close what I'm working on. Restarting the application "fixes" the problem. Hiding and Unhiding the window does not, nor do the missing windows appear in Expose. In the case of VMware I've found that switching the vm to fullscreen allows me to pause it properly and not loose any data. Good luck to anyone else who run's into this. Hopefully enough people have filed bugs, and we'll see a fix in the next maintenance release.