As discussed in this thread on the Round Tables, TopCoder holds coders responsible for knowing about bugs in the particular versions of the language implementations they use for system tests, no matter how obscure. I defer to that thread for arguments for and against this policy, because it provides the opportunity for discussion.
In any case, I decided to review known bugs in the Java and C++ implementations used by TopCoder and provide summaries here. Because this information is provided for free, any use of it is entirely at your own risk. For reference, the hardware and software used by TopCoder is stated in their FAQ.
Note that most of the bugs I found were less significant than the one that vorthys encountered.
If anyone knows of any additions or clarifications that should be made to these lists, please let me know.