It appears that after updating my Firefox from 1.5.0.7 to 1.5.0.8 all text, including titles and entries itself, are bolded in this forum.
There is no bolding "On" when tested wit IE6.
Any similar experience?

can you show a picture?

I think it shows bold when you increase the font size. Can you tell us if it's back to normal if you choose "View -> Text size -> normal" from the menu?

How brilliant...
When switched to 'Normal' size text and titles are not bolded any more!
Thanks.