With 1.6.0beta4, I have observed quite a number of times where pasting some text copied from kpdf resulted in "command disabled" and nothing get pasted. I often need to copy the exact text again and repaste (may need to do twice or 3 times at most usually). Strange is that it would work in the end (with the exact same text), but I can't a way to reproduce it as it always happened randomly to me.
I don't remember observing similar behavior in windows platform. I'm in gentoo linux with KDE 3.5.9, qt 4.3.2 with klipper not running. Any idea what's the cause of it?