On Mozilla 0.9.6+ build id 20011120, but seen on older builds. Radomly garbage appears in the first rule on rules.dat, rendering the filters non functional. I clean up the rules.dat and after a time it happends again, cleaned my profile with no luck.
*** This bug has been marked as a duplicate of 11439 ***
That duplicate number should've been 111439.
Damn, thats where my bug went when summitted. I dupped myself :( grrrr. sorry all for the excess work