when DOpus has not been opened yet (after reboot no DOpus window has been opened) and I try to enter the prefs by starting Directory Opus Customize through the windoze system settings sometimes the DOpus task hangs with 100% core activity.
I can't reproduce it, even after a reboot. I've tried on two machines (both 32-bit, one Vista an the other Windows 2000).
There was a bug with the control panel icons but it was fixed back in May 2007 (version 9.0.0.1). Aside from that I've not heard of any problems, though I imagine very few people open prefs/customize via the control panel, which makes problems less likely to be noticed/reported, I guess