This evening, having run my Mini for a significant period of time (syncing my Exchange account - yawn), I noticed I was suffering from artefacts on the screen, typically relating to mouse pointer movement. :cry:
Examples of the artefacts would be a mouse pointer trail or distorted blocks, perhaps 15-20px square which haven't refreshed properly.
I will re-run the latest version of EFI to see if this fixes it, bit my primary concern is that it appears to be similar to corruption I have experienced from video card that approach failure on other systems. Has anyone else experienced anything similar and resolved it either way?