When the build log contains structures like "<SOMETHING>" or "<<SOMETHING>>", the output becomes "" or "<>". This applies to all browsers (tested with Firefox 3.6, Safari 4, Chrome).

In Firefox 3.6, HTML-like structures can also truncate the log, i.e. the log is only shown up to before the offending text. This doesn't happen with every occurrence of a "<...>" pattern, but for example this breaks it:

2010-03-10 13:49:39,978 DEBUG – 1 result(s) from test_department in 1 ms. <<T[8672,MC,UC,C[9,RC,users=1,reuses=166,sets=0,pool=transactional-read]]>>

Workaround: use the plain text console log instead.