The arrowheads weren't showing in IE 6 using Formal white (nav bar and calendar). Andrea Bicciolo quickly fixed the font issue so the arrows show now but they show without a space before them (see attached image).
Thought I'd check all themes and results where:
- Orange white (and the PDA version) has the font issue - arrows don' show
- Custom corners is fine
- All other bundled themes show the arrows but without spaces in front of the arrows
Initial forum post: http://moodle.org/mod/forum/discuss.php?d=91942