A quick update before I get to the problem, I am now running the Xfce version of siduction on my main system. I have been now for a few weeks, and Linux Steam and everything else I need works beautifully.
Recently, I've been having the urge to play a couple of games only available for windows (mainly Skyrim, which in ludicrously cheap at the moment), and installed the Windows version of steam using wine. Pretty much everything works smoothly (I played Cloney for a while). However, when I try to go to the Steam store or community, I get a blank page and the 'loading' symbol. I came across a fix (on the Arch Wiki), that mentioned installing ms fonts. I already had these on the actual system, and installing them with winetricks changed nothing. Any ides?
Ps. I'll probably get skyrim while the sale's still on, It's under €10 right now, so there's minimal loss involved if it doesn't work.