RE_BAD_SYNTAX_FOR_REGULAR_EXPRESSION for regexes using capture groups.
OK, I'm pretty sure that you are running FindBugs using Java 6. I tried the example...
Allow skip of individual SF_SWITCH_FALLTHROUGH
First, the example you show for CheckStyle isn't a bug and FindBugs wouldn't complain...
OS_OPEN_STREAM not detected
Eclipse plugin inconsistent redundant null check