"A possible workaround is to Hit the C,X, or Z keys in ArcMap to free up the respective tool (C for the Pan tool, X for the Zoom Out tool, and Z for the Zoom In tool)."
The thread mentioned a bug, and referenced this workaround as a band-aid. If this workaround doesn't help, Could I trouble you for more information? Which product are you using? Is the software up-to-date? Is your cursor stuck on rotate from the moment you open the app, or is the onset delayed?