Raspbarry Pi overscan mouse trouble

Hello, I’m using a raspberry pi 2 with a TV. Everything is fine with RC14 but with the latest nightly rom and overscan the mouse behaves as if the left and right of the screen are the overscan area, so the pointer doesn’t line up with the video.
I found some old posts with the same issue but it seems to have re-emerged.

Try updating to the latest firmware – IIRC the most recent problem was caused by the foundation changing the way overscan is calculated, which then threw off the calculations RISC OS was doing. The latest development ROMs have been fixed to work with the new scheme, but that does mean that the position will be wrong when used with old firmware.

Okay, that makes sense. I switched to a Pi 1 and had the same issue. I managed to disable overscan on the TV but I’ll update the firmware anyway to be on the safe side.
I’m also having an issue with the cursor continuing on its trajectory after the mouse stops. I think it only happens after restarting or a soft reset.