In single player, access keys (red, blue, yellow) don't show up, however you can still pick them up as usual.
Windows 7 64 bit
AMD Phenom II
NVidia Geforce 460
Not debilitating, but could prove troublesome in later levels.
Tested in First Strike only, have not looked to see if the issue persists in Counterstrike.
Bug persisted through levels 1-3 of First Strike over the span of 2 days. Have not tested level 4 and up.