Has anyone come across something like this exclusively in Chrome 10/Win?
I commented on this question before and just found some extra information for people having trouble with the boxes and spaces with 'X' for line breaks, end of line and space characters in Chrome, Internet Explorer and Firefox. Yes, sometimes regenerating the font files improves things but then I noticed my problems largely went away when I added unicode characters for spaces and new lines. Paste the following into the Unicode Ranges field on FontSquirrel when generating your fonts:
0085, 000A, 000B, 000C, 000D, 2028, 2029
For good measure I also type a spacebar into the Single Characters field.