[vox-tech] application greyed out

[Hai Yi]

hello All: I am using ubuntu 9.10, in a quite frequent fashion, I
noticed that the whole UI screen of some applications just grey out
after working a while, as if they are under heavy resource consuming
tasks.

So far, this happened to Firefox and eclipse since i use them most,
but very likely this is not related to any particulars. Normally I had
to force close them, but sometime they are back to normal after a
while.

Anyone experience things like this? Ideas?

Thanks!
Hai