I have an odd problem with my WordPress. I have a theme-switcher plugin installed, and 3 active themes. The problem arises when the default theme is selected (when the link for it is clicked). It just shows a blank page. I have to remove the "www" if is there, OR ADD the "www" if it is not there, for the site to show up again. It's very odd. I've tried taking out the WWW and adding it in my WordPress options. Doesn't seem to fix the problem either way. I also tried this plugin that enforces either "www" or no "www" according to your wordpress options, but that didn't help either. Neither did changing my domain settings to either include or exclude the WWW.
This happens no matter what theme I set as the default. I don't know what the problem is. The permissions for each theme's directory are all 755.
Any help would be very much appreciated!