Thanks for the input. You are correct that I'm running an Athlon64 chip, but it isn't overclocked. And Shedko Badges is not installed on my machine.
But you were onto something with the RAM.
I use Crucial brand memory almost exclusively. On this particular machine, I'm running 3x512 DIMMs. When I opened the case, I was surprised to discover that one of them was made by PNY. Apparently, we swapped out the third Crucial brand DIMM for one reason or another - probably to diagnose a client's machine - and never swapped it back.
This morning, I pulled the PNY brand DIMM and replaced it with one made by Crucial that is an exact match for the other two. Great move!
Two niggling issues on this machine have since disappeared completely, and the overall performance is noticeably better. Excellent call on your part. I wouldn't be surprised if the issue I had with CintaNotes would also be fixed by this.
Next time I have an oddball problem I'll have to remember to look at the hardware as well as the software.
Once again, thanks for your suggestions.