After installing 10.5.5, whenever Time Machine initiates a backup my curser goes berserk - jumping all over the screen until the backup process is finished.
iMac intel 2.4, ibook,
Mac OS X (10.5.5),
4gig ram
Not that I'll have the answer, but a few more details will help.
USB connected mouse?
USB Hard Disk for TM backups?
Are they attached to the same USB port on the iBook? Or on opposite sides?
You machine descriptions are changing in your profile - but which Mac is experiencing this condition? The iBook or the iMac? The iBook is relatively dated now so if it's that one I'm not surprised OS 10>5 is taxing the CPU.
Not sure why that info is changing at the bottom. This is my intel 2.4 iMac w/4gig RAM. Out-of-the-box keyboard and mouse. I do not have a Time Capsule (even though my post indicate that without my input). I have had no probs with my machine until this last OS update, and at that, this is a minor yet irritating one. The drive I use for my TM back-ups is a USB Western Digital.
You might have Bluetooth enabled. Turn it off, and make sure the bluetooth mouse setup is not active.
From all the posts I've read, there's some sort of conflict or cross-talk between the WiFi and BlueTooth connections, and if Bluetooth is active it can apparently send spurious cursor control signals.