Sidebar font size changes when I use html

Hello there!

First of all thanks for this wonderfull theme - I like it a lot.

I've well a little problem with it: when I wanna use something like "<p align="justify"></p> (or different html) in the sidebar the font get's smaller. If I write only a text without any "code" it's the normal size... Here's a screenshot of it:

http://i1281.photobucket.com/albums/...psa1f3c656.jpg

Also the "recent entries", "recents comments", "categories" are smaller as they should be.

What's the reason and how can I solve it?

Thanks and best regards