My best guess:
Based on a little light Googling, it appears that repllog.exe is the ActiveSync app from your phone's end. If you had a custom rom, I'd say the application might be the problem, but since there is no such custom rom for the Imagio yet, something must be wrong with a registry entry that points to the application.
Don't know what kind of registry edits you've been doing or what kind of .cabs you've installed, but I'd bet that's where the problem lies. You could try uninstalling some of your newer apps to see if that fixes the problem. You could also see if someone can list for you the important registry keys that point to repllog.exe. That'd be above my skill level.
If I were you, I'd just uninstall a couple newer apps, and if that didn't work, go with the hard reset. I don't even use any fancy backup app, I just sync with My Phone and keep all my favorite .cabs handy, and it's pretty easy. Worst-case scenario, 30 minutes of work.
Oh, and some of the info I found came from:
http://forum.xda-developers.com/arch.../t-349051.html.