>Are there any updates to VFP 6 post SP3?
>
>I'm still getting C0000005's when manipulating complex object structures. I think the objects internal reference counters aren't keeping up!

Nope. If there was anything it would be listed at:
http://msdn.microsoft.com/vstudio/downloads/updates.asp

Check out the foxwiki for ideas for fixing C5 errors:
http://fox.wikis.com/wc.dll?wiki~C0000005ExError