Site Meter makes sidebar disappear

I used Site Meter with no problem for several months. Then, one day, my main blog page was screwed up. When I removed the Site Meter it was fine. I tried changing themes, which brought my blog back up, but each time I installed the sidebar code for Site Meter, the same thing happened again (I just cut and pasted the code from the Site Meter webpage, as I had before). The odd thing is that this is only on the Main page….if you click on the “about” or “archive” tabs, you see the blog with its sidebar, as it should be. Any suggestions as to what’s going on?