Multiple Monitors
The screensaver supports multiple monitors. I have tested it on a few dual-display systems, but in theory it should work on any number of displays if you have enough CPU horsepower... So go on, The Matrix really does have you this time.
Note that only the logo and matrix-code sequences appear on all the monitors.

Juddery Animation
If you have an intensive task running on your computer when the screensaver starts up then the animation can appear hesitant and juddery. Very little can be done about this. I have attempted to regulate it more effectively, but if your computer is too busy then the screensaver simply won't get enough time to run properly. The screensaver is set as a low priority application and will yield to other programs on your computer.
If for example, you are encoding a movie, you certainly don't want the screensaver sucking time away from your encoder such that it ends up taking twice as long!

Animation and Computer Performance
The screensaver will run on older and slower computers (e.g. <1GHz.) It tunes the animation accordingly, such that less happens on a slower machine, but the screensaver much prefers running on faster machines (>2Ghz.) Everything is so much better. The animation is more intricate and detailed and the matrix-code is more fluid and dynamic, with many more changes. If you plan to run multi-monitor then for the best results a faster machine is a essential.