I've updated my test box from 7.104 to 7.200..
I was using 3 site-to-site IPSec vpns which was working fine..
1 with passthrase (with Tripple DES PF) and 2 with RSA (with AES 256 PF)...
after upgrade, only 1 vpn was likely to work (but not each time... some times was runing, some times not,...)
after several reboots, was still not working... [:(]
finally I restored the config backups I did before upgrading and rebooted and everything was working back again..
when I checked in the log for IPsec yesterday I got messages like "has no cert" or something...
now things are working fine... even after reboots..
I've also activated HA active/passive at same time, so maybe this is an issue linked to that also.. ?