In-context editing while in Isolation

Hi
I was working in an in-context assembly, editing and creating partsin-context, after having 'Isolated' those subassemblies which I wasworking with. After the session I saved and closed, no errormessage, no crash. After re-opening the project I realised that_all changes_ (assembly mates, etc) were lost. Parts, created andsaved during the session had no feature at all (part was saved but'empty', showing no feature). Strangely, changes in ALS parts hadbeen saved, but only those, which were not in-context. Those within-context relations had not been saved (ie. one sketch was therebut the other was not). As I wanted to recover I realised that _no_backup files had been created in this session and there was noautorecovery file either (probably right because there was nocrash).
Has anyone seen this before?

Windows 32 bit XP, SP 2
SW 2007 SP 4.0

Regards:
JohnSolidworksAssemblies