I'm getting a weird bug where the mouse cursor is invisible in the main screens but I can see it in the save/load screen. I can still use it as the locations and such do highlight when the cursor is on them but when moving it around I need to switch to the save/load screen to see it's exact position.
Edit: Got the cursor back to normal. It seems to have been affected when selecting whether or not to assault the first keep in the game. Chose to abort the first time as I didn't have enough orcs and that's when it vanished. After going back and completing the assault it went back to normal.