I noticed the same behaviour on the latest Kubuntu Feisty binaries (Kernel 2.6.20-13-generic) and with the gspca driver (newer version of spca5xx). For some reason everything was ok with msn webcam chat in Edgy for me. Therefore I am not sure if the reason is the same.
# lsmod | grep gspca gspca 607696 0 videodev 28160 1 gspca usbcore 134280 8 gspca, ** Attachment added: "backtrace" http://librarian.launchpad.net/7036793/backtrace.txt -- kopete seg faults using webcam MSN Kubuntu 6.10 https://launchpad.net/bugs/85228 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs