Main page only loads weird characters (Windows only)

Hey guys,

For some reason, every few days the main page of my blog will not load but instead a ton of weird characters would. This problem has happened in both IE and Firefox and is completely random. Right now, its in FF only but 2 days ago it was in IE. it has nothing to do with single posts or anything because if I go to any subsection of the site it works fine. This happens only on the main. Ive found if I revert my theme to the default theme and then back to what it is it temporarily fixes it. But I would like to get rid of it all together. Your help would be much appreciated.

Screen shot of how things are displayed is below:

Screenshot