Without a link to your site, it is nearly impossible to tell what is wrong.
One thing I have seen causing this type of problem is having images that are too wide. Have you tried posts with just text?
I don’t have any images on my main site which is myrandomdeals.com the only theme I can even get to half way work is holistic tea house I think its called.
How ever I did try to get the same theme to work on my sub domain diabetic.myrandomdeals.com and it wouldn’t work soon as any text was posted. I really wanted the feed me seymore theme or HeatMap Adsense Theme
but every time I just get it installed on a fresh wordpress installation and everything seems fine as soon as I post something it kerbunkles on me.
It is getting kinda frustrating as I have quite a few ideas for certain things I want to do affiliate wise and I can’t because it does not load right with other themes that I would like to use.
I found a nice suttle theme to use for my brothers site I am going to make for him and his Tattoo business but I am afraid that as soon as I get wp installed get the theme installed then make a post it will screw up.
As I mentioned above I have attempted multiple things such as disabling all plugins and widgets and what not.
If it helps I do use hostgator as my hosting provider.
Sorry for the late response I have 2 kids one will be 2 soon an the other is 4 months old lol.
Start by sorting out the markup errors. Your posts are littered with unclosed link tags.
http://codex.wordpress.org/Validating_a_Website
