Is anyone having live tile problems after Black update? Seems like they're not getting updated properly.
Mine were flaky at best before the Black update and have worked perfectly after the Black update.
Before Black update, I could only support 3 total live tiles, and even with 3 they weren't updating.
Keep in mind, WP can only update live tiles every 30 minutes (I believe that's the case).
Maybe there's a cache somewhere that gets corrupted. Clear all caches etc.
When my Bing Weather app crapped out on me before Black, I would uninstall it, restart the phone and re-install the app and everything would work perfectly.