okay, IIS caused this. It's not RedDot. I found this in the Eventlog:
Event Type: Information
Event Source: W3SVC
Event Category: None
Event ID: 1074
User: N/A
Description:
A worker process with process id of '.....' serving application pool
'.....' has requested a recycle because the worker process reached its
allowed processing time limit.
So i'm gonna update the recycle-settings for the defaultAppPool that
RedDot runs in. Does anyone have experiences on this? Does RedDot need
recycling at all? Is it okay to recycle the process once at night
(when the editors are sleeping)...?
Heiko