Fuzzy Textures & Textures Rerezzing

Anyone know of any issues with fuzzy textures, after a system rebuild only the textures directly within the camera view are rezzing fully, those outside of the camera view remain fuzzy, any ideas? .. The textures rez completely, then rerez over and over infinitely. How can I stop this from happening? I've noticed the same with the standard viewer, the Release candidate viewer and also Snowglobe. Clearing cache etc hasn't fixed his, is there a debug setting somewhere that's been triggered causing this? Any help apprciated

This reminds me of a super-accelerated version of http://jira.secondlife.com/browse/VWR-11420, which was fixed early-on in the 1.23 release candidate cycle, but maybe there's some overlap in the faulty mechanism. Scanning through the jira comments quickly, I didn't see any debug setting to affect it, but to rule that out, one could hide the settings folder from SL and see if it makes any difference to the behavior.

Another step that may help narrow the problem space could be to open the texture console and see if there's any unusual pattern to what's going on there.