I seem to have some real problems with font display in the recent version
 of
firefox on SL 4.5 (if I install firefox2 by hand, no such problems occur)
. I
tried both i386 and x86_64 versions, and the problem seems to be indentic
al,
see the attached screenshot of "about:plugins". If you highlite text (by
right clicking and dragging) the tex display changes as well, from very
compact to extremeley widely spaced, or vice-versa. Also the mouse cursor

doesn't always appear at the insertion point. (Usually at the end of text
 in
a text-box, even if the inesrtion point is in the middle). This seems to
occur on a few computers, but they all have similar installations.
I am really baffled! Anyone have a suggestion?
Niels Walet