New to PC--Having Issue with IE8??

 

I'm curious, I am getting close to launching my pc, and in the process of launching I've had a neighbor on unemployement helping do some basic database entry work.  On her computer which runs XP, she uses IE8, and it's having some really wierd problems viewing the site.  The most recurring issue, and she's had this problem in Firefox as well, the body text is overlapping with the right column.  I've included a picture below:

 

 

Has anyone had a similar issue?  If so, do you know why it's doing this?  Could it be a style sheet issue?  Or could it be related to XP?

 

Thanks for your help!