It happens for example with the PGF 1.18 manual (attached).
I am seeing this both with and without compiz.
A little more experiments indicate that it might have something to do with searching for text inside the pdf. It seems as if a search "locks" a page, even if the search "menu bar" has disappeared. When it "locks" I can not use Previous/Next either.
So the bug is probably more about having a visual cue that a search is still in progress.
Thanks for the quick reply!
It happens for example with the PGF 1.18 manual (attached).
I am seeing this both with and without compiz.
A little more experiments indicate that it might have something to do with searching for text inside the pdf. It seems as if a search "locks" a page, even if the search "menu bar" has disappeared. When it "locks" I can not use Previous/Next either.
So the bug is probably more about having a visual cue that a search is still in progress.