Major Problems Just Editing & Saving

I just had 2 blogs integrated into my 2 sites, http://defendthyself.com/blog & http://eyespypro.com/blog, and I am having major problems to just create or edit my blogs. I use a Dell PC @ work, and a Mac @ home. I can not successfully create and edit any posting on the PC. I can’t get it to work properly in IE, Firefox, or Safari Beta. On my Mac, I can’t edit or save properly in Firefox. The only browser that will let me create & edit is Safari for Mac. Is anyone else having these problems? Why would I not be able to do this on the PC, when the whole world is using PC’s to edit their blogs. Something is wrong. Can anyone be of help?