A coding query

[boji]

When I set up my Dreamwidth I used Tabula Rasa and the wizard, alone. I'm quite pleased with the look but one thing is borked: When I go to reply to a comment my comment box veers right, floating as it were into the sidebar as the image below shows



I imagine that I need coding to tell the box to wrap, or not to float.

Can anyone please help, as I'm rather coding illiterate?

Thanks,
B.