Microsoft fonts (Consolas, Calibri, Candara, etc) not displaying in Safari since Lion upgrade

Question

I can't see what I type as I write this question in Safari – all I see is lots of capital A's in boxes. I'm new here, so I'm not allowed to post a screen grab. No problems in other browsers, or in other apps. Seems to affect all the relatively recent Microsoft "C" fonts, but not Arial. I am using Font Explorer X Pro, which has exhibited a bit of post-Lion flakiness, but given it is apparently limited to Safari this is quite possibly irrelevant. Anyone else had this problem? Any ideas?