Even though I have updated to WordPress several times (incl. to new version 2.6), I continue having this problem. I choose the theme for my site, and within about 24 hours the theme look reverts to the Default theme. When I look at the "Design" portion of my blog in my dashboard, it still lists my chosen theme, even though it shows up differently when I go to my website.
Another weird thing about this is that I host a couple blogs through one host and only this one - http://www.missadventures.com - has this bug. I've seen other answers to similar questions about renaming the default theme, but that doesn't work at all. I've also tried this using several different themes in case my preferred one is the problem. But the same thing happens.
Does anyone know what I can do? This is my "main" website, with my portfolio. So, I like to provide the URL to business associates.
Thanks in advance for your help!