Surround tests for known bugs with #ifdef KNOWN_BUG.
Surround tests for known bugs with #ifdef KNOWN_BUG.

darcs-hash:20090519182942-ced27-55f49767d855115de601a033565d11e621c5f406.gz

amlweems/tre,laurikari/tre,laurikari/tre,amlweems/tre,amlweems/tre,laurikari/tre