Running XP with NOD32, AVG Anti-Spyware and Windows Defender. Even with v3 disabled, Firefox and IE7 crawl and are very erratic while sandboxed. They both run normally not sandboxed. Have uninstalled v3 for the third time.
This isn’t a bug, it’s a compatible problem between the two softwares.
Also, I’m closing this since you posted about this here.
Cheers,
Ragwing