Comment 1 for bug 42909

quite the same problem for me...
same pc (toshiba satellite m-70)
kernel 2.6.15-19-386 works, (-20 maybe also),
with the following kernels,
including the new 2.6.15-23-686/386,
i got error messages similar to these.
but not on boot: gnome starts, but freezes immediately when i try to open a menu. i can change to another console [ctrl+alt F2/3 etc] but when i try to login again, i get those error-messages above mentioned. a hardboot is then the only possibility.