Version: 2.0.82 (using 4.2.98 (KDE 4.2.98 (KDE 4.3 RC3)) "release 146", KDE:KDE4:Factory:Desktop / openSUSE_11.1)
OS: Linux (i686) release 188.8.131.52-0.1-default
Configure kile to use static linebreak. Now have some part of a text you want to comment out. You mark this part and choose comment (Ctrl+D), there may be lines which have no '%' in front.
This happens if a line is so long that a new line break is applied due to the '% ' which is put in front. I can actually reproduce this with only one line which is sufficently long.
rpm -q kile
*** This bug has been marked as a duplicate of bug 105373 ***