Dear Mrs. and Mr. Forum,
there is a bug in the 'Gcd' and 'mod' routines for polynomials over
the rationals in GAP 3.2 Patchlevel 2. As far as I can see the
routines will not give wrong result, but you *might* get a weird error
message using 'mod' or an infinite loop in 'Gcd'. This will be fixed
in the next patch kit.