Sidewinder has put in a fix to the llTargetOmega bug on the beta grid. I have been testing it, and it seems to fix not only the one people are reporting, but another older one, where child prims don't rotate properly with llTargetOmega scripts.
For those not following it, the llTargetOmega bug showed up with 1.19, and manifests itself by having objects not rotate. Yedo has a peculiarity, one of the sculptures here would keep rotating, even when all the others stopped at once.
So at least some progress has been made, though I really want to test this fix with the current viewer... The beta grid really needs to have that... the current client, and RC attaching to the beta versions of the server.