said David Bell:
| I find that my curser jumps all over the place periodically whilst | typing in Kmail. It used to happen whilst I used the Kmail, in various | distros using KDE4, and seems to be present when I use Trinity with | Ubuntu 12.04. | | Has anyone else experienced this and is there a remedy?
actually, it's the cursor -- the curser is what *you* become when it happens!
i've encountered this also, on several versions and in several distributions. in my case, it is the result of switching between a serial pointing device, where it was never a problem, to a USB one, where it sometimes is. i've not found it to be application-dependent, though.