A bug in the F4 algorithm, which occurred when the hash table was greater than 2GB, has been fixed. (Reported by Markus Grassl.)

Several bugs have been fixed in the modular symbols and modular forms package.

Crashes when applying Simplify and SimplifyLength to free finitely presented groups have been fixed.

The function Coordinates was unable to deal with unprecise elements in real lattices. It now returns a proper error message.