From Bugzilla Helper: User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.4.2-0.1.25smp i686) in rxvt-2.7.5-12, the patch which fixes an autoconf logic reversal in the wheelmouse support has been commented out of the specfile. For some reason, if --enable-wheelmouse is selected in the configure, then the NO_WHEEL_MOUSE define is defined - the opposite behavior from what you'd want. Someone has already fixed this. But, the fix is currently commented out. Uncommenting Patch7 in the specfile fixes this bug. Reproducible: Always Steps to Reproduce: 1. Try to use a wheelmouse! 2. 3. Actual Results: It doesn't scroll. Expected Results: The history should scroll. My guess is that the dev branch of rxvt, 2.7.x, fixes this problem, and that when you guys went to this branch temporarily, the patch for 2.6.x was commented out since it wasn't needed anymore.
hmm ... don't know who commented out the patch, but as you can see in the history, this was already fixed. Reenabled the patch. Should work now.