P.S. Can’t you find more informative labels than F0/E5 for the buttons here?
Um… your computer’s chosen font is missing the glyphs for the buttons or webkit (which is what I believe BB uses) is not rendering stuff correctly in your browser. What I presume is showing up is the unicode fallback font for debugging.
http://scripts.sil.org/cms/scripts/page.php?item_id=UnicodeBMPFallbackFont
This is what it’s supposed to look like:
