Thanks for reporting this. We had logged bug18106727 to trace it. Thanks.
How would I go about searching through the bug list so I don't report known bugs?
You probably can't. You can sign into MOS and search the published bugs, but many of the internally filed bugs logged from here and by QA aren't published.
The forums aren't setup to be a workaround/alternative to Oracle Support.
I'd rather you search the Forums to make sure your question/report hasn't already been addressed before opening a new thread, but at the end of the day, we're here to help each other.