That image definitely looks like an unstable interface to me.
Try setting Windows back to the default settings, and use the Import command again to see if the interface is still unstable (corrupt) or if it is repaired.
If it is repaired, then I would suspect one of the following:
1 - an incompatible WB skin
2 - you are running another customization program that is heavy on your resources, and the instability is being caused by lack of resources available to CorelDRAW.
3 - You have found a bug in WindowBlinds and/or it's compatibility with CorelDRAW.
BTW - I have had a couple of issues that invoke C.A.R.M. while working on a project in CorelDRAW 12, which seemed to occur when using multiple commands that required redrawing frequently.