Check Win7 monitor setup, is it seeing your 3 Acers? or is it generic monitors it sees?
11.5 working here just fine, and also on my MD230)x3 monitors. Seems that Win7 is not seeing your monitors in true res. Distorting your color and contrast!!!!Default to generic monitors will do this, make sure All Three are seen, not just one, Some times Win7 will see one proper and others as Generic!!!! So check Monitor properties and change if nec.:thumbup: