I've been running a few different WM 6.5 roms on my Sprint Touch Pro with no problems with Magicall. Silence roms, Energy Roms, Mighty Roms, etc.. some with manila 2.5 or Titanium, all on WM 6.5. The only issues I have with magicall not working properly for me is when I have a bad filter or have a rule that is not in the proper order. My rules / logs are backed up on my SD card and are restored correctly when I re-flash to a different rom. Maybe a re-flash might resolve the issue for the Leo...
Thank you for the info, mr.fabe.
I've not tested with WM6.5 yet. Because I could not find an official ROM for my Touch Pro yet. I don't want to test on a cooked ROM.