no problem with the drivers here...
do as Odonadon says and tweak the contrast/brightness/colour on yer tv...and you could also adjust the colour in the ATI control panel...
certain colours on my tv also bleed (deep reds and medium blues), but fiddling around with the colour settings has *almost* cleared this up (and it'll be even less noticable with tinted plexi/perspex mounted in front of the tv)

...quick tip for ya...run mame with a game that has noticable colour bleed, then take a snapshot (F12), exit mame, open the snap shot, resisze to full screen, then start adjusting the colours...
least then you've got something to judge the level of bleed...saves you running, closing, rerunning mame...