Disk permissions repair but immediately change back, why?

Yesterday I was trying to find an old news article by using a search engine. I clicked a website from the returned list which had the information highlighted that I was looking for. Seconds after visiting the website, the address changed and I was brought to another website which made safari stop responding, so I used force quit. Moments later, I began noticeing other applications were not functioning properly. I went to check my disk permissions and several had been changed. I repaired them, and it states they are "repaired" but after running the verify again it reports that the same permissions which were just repaired have been altered. When using a guest account, everything works fine, but I'm worried something serious has been done to my administrator account. I want to reformat, but I am currently working in Japan and I foolishly left my Snow Leopard disc back in the U.S. If anyone has any suggestions or insight to what may be the problem, it would be greatly appreciated. Thank you.