hi Velusion - I've been importing models into zbrush where you also need quad polys exlusively and i found poly cleanup worked but not by repairing - rather check the option to select non-quad polygons.
I also found my poly count dissappeared with maya 6 (headsup display/polycount) but it returned when I installed the update to 6.01.
Good luck
Check out the subsurfacescattering on my tongue...
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