Xcode Code Sense horribly broken?

Ever since I started using Xcode, I've experienced extremely annoying problems with Code Sense. The problem is that when Code Sense kicks in for code completion, sometimes the source code text below the line I'm working on goes "crazy". If I continue typing, the problem gets worse, and after a while the source code is completely screwed up (funny colors, missing lines and characters, ...). Strange enough, the source code itself is unaffected, because when I select another source file and then go back to the one I was w开发者_开发百科orking on, everything looks fine again.

The problem can be seen in this screencast: http://www.screencast.com/t/OGY3NWE5

Interesting facts:

• This problem has occurred on 3 different machines, so it's not related to a corrupt installation.
• Sometimes it's fine for a while (up to one hour) after launching Xcode, but once it starts happening, it's getting worse and worse, until Xcode is restarted. Then it's fine again (for a while)

I've searched the web for similar experiences, and I can't find anything. I would think that it is a known problem, since it occurs on 3 different Macs here (both running 10.5 and 10.6).

Anyone having the same problems? Or a suggestion for fixing this?

Yeah, it can be a real pain. I didn't find a 'fix for it as such, but I do a quick switch from implementation to header (or vice versa) and then back again using Command-option-up. The screen redraws and everything is fine again

Well, I finally (kind of) fixed this problem by simply turning off Quick Help. Previously, I left this on all the time, and it resulted in a very unstable code sense (to the point where Xcode simply became unusable).

This is not a real solution, but it should at least help people experiencing the same issue.

I wrote about it here

My issue was with localization. if your XIB file is localized using xcode 4's, then it was failing for me. removing the localization worked, though not a proper solution.