I didn't know what a button remapper was until I had this problem. I flashed the quattrimus ROM and the iscream kernel just like before. Should I try the ROM without flashing the kernel?
That's the problem. Starting with alpha7 I used a "native" OV kernel so I also used a "native" OV keymap. The iscream kernel is for the OS and so you have a mismatch.
If you prefer the iscream kernel just edit your keymap file to match the kernel.