I did not spot the problem with the timeout tests. Too many test failures in the AS trunk at present, it makes identifying regressions a bit tricky. I'll take a look shortly. The TS 4.3 code has the new asynchronous transaction reaper, so it maybe something in the config for that which needs tweaking.
Right now I'm hunting down the cause of the NullPointerException which is killing testGetAfterComplete and testGetInitialAfterComplete. With that done TS 4.2.3.SP6 should be just about ready to go into AS 4.2.2.