I have been running BDAV Plus 2012 since August, with the exception of a month or two when I switched back to v. 2011, and I never experienced Bitdefender services stopping in this version.
But this week, the Bitdefender icon in the Notification Area turned gray twice, asking me to restart the computer because Bitdefender services stopped working.
The only changes on my computer that week were installing and playing some Minecraft, and evaluating Backblaze online backup service.
I wonder if other users had their Bitdefender services stop too, if it's maybe linked to a recent update.
I don't remember doing anything special that could have caused this issue, I'll try to monitor my computer more closely if it repros.
I thought I should log these 2 instances here in case someone else has the issue.
Maybe the support tool file I sent to Christian earlier today contains something that can help too.