Text Overlapping

Hello, I have recently setup my wordpress blog, after swapping from nuclues (I have found wordpress much more feature rich), but to the point.

I have composed a fair few posts, although now my text seems to overlap the CSS, meaning that text from the article is not forming a paragraph break, causing the text to just go straight accross the screen :S.

I have tried composing and viewing the site on Opera (Default), firefox 2 and ie6 and no result 🙁

You can see what is happening on this post over at my website:

http://blog.ec9.org/?p=29

and even worse here:
http://blog.ec9.org/?p=30

Thank you for your time, any help would be greatly appreciated.

Kind Regards, Peter.