Nope, you aren't the only one with the problem. See Edit window pet peeve that didn't get fixed in 7 Thread #548897 Message #548897. Mike Stewart was able to repro the problem in that thread. Apparently it wasn't fixed by SP1 either...

>>Hello. I have recently been very annoyed by a problem that was in VFP6 SP5, and appears to be in VFP7 SP1 as well. It appears the scrollbars in the code-view for classes doesn't work properly-- it does for PRG files. Here's a step-by-step:
>>
>>1. Open/create class and modify a method
>>2. Enter enough text in method to enable scrollbars(make it a few pages worth to make the problem easier to notice).
>>3. Move the scroll block to the middle of the scrollbar
>>4. Move the mouse cursor over the scroll block and click without moving the mouse position itself.
>>
>>You may notice(I've done this on numerous systems), that the scroll block automatically pops up about 50 pixels, moving the text the appropriate amount as well. I have been forced to actually click on the scrollblock to scroll, as my Logitech's scrolling function doesn't work with VFP(it's the only application I've found it not to work with). Right now, I'm doing as much scrolling as I can via the keyboard, but it would be nice to have a compliant GUI as well. Any suggestions? Thanks.
>
>OK, so I'm not the only one with this problem. My solution is to use the wheel, or compensate for this bug by more movement (and make sure the children don't hear the language). The good side of the wheel is that you don't have to activate the window to get it to scroll - it works on the window the mouse is over, not just the active window.