I am not sure whether I accidentally assigned Alt+F8 for XBench QA (which doesn't seem likely), but I found that both XBench QA and Web Lookup use Alt+F8 to invoke their programs. I removed Alt+F8 from the keyboard shortcut list for XBench, since I only need to run QA at the end of each project. I thought I would post this here in the Community for people who use both apps and may be experiencing this issue as I was.
Chunyi