In the reports if there are underscores in the status name, the status gets screwed up.
Original Report
On another note - when I added the sample "enterprise" workflow from the Trac 0.11b1 distribution, which has '_' in some of the status names such as in_QA and post_review, the T&E report manager upgrade added the new statuses to the queries OK but when I executed queries from the Management tab, they failed complaining about missing $IN (and when I defined $IN, missing $POST). The query had $IN_QA and $POST_REVIEW defined so it would seem underscore is not a legal character. Once I removed the underscores from the status names in the workflow, T&E reports executed just fine. I don't know if this is a problem with Python, PostgreSQL, or something else (I'm a C++/Java developer, not Python nor SQL).