I had this problem also…
Problem is caused apparently by some dll you find only on 1.5.x version of wine.
I think it's called dwrite. if you add it with winecfg and immediately disable it, fonts show again on steam.
It's worked for me, though i don't have a clue on what happened.
Maybe someone here can explain it
KornyAlexMember Since 23 Jul 2009
Offline Last Active Yesterday, 10:10 PM