The style clearBoth in your template also sets the font size to 2 pixels, causing the text to be so tiny. I'm not sure how to fix this permanently yet, but a workaround is to change, in includes/templates/<YOUR TEMPLATE>/sideboxes/tpl_poll_box.php, line 113:

from: $content .= '<div style="width:99%;" class="clearBoth">';

to: $content .= '<div style="width:99%; clear:both; font-weight:normal; overflow:hidden;">';

This should, in your template, prevent changing the font size and weight and cause the text to display correctly.

Please let me know how this works out.