Causing a redirect loop

I’m having a problem on one of my sites with Custom Permalinks. It’s causing a redirect loop when I try to edit my pages in Thesis.

When I go to edit, it should go to this page:

http://www.sitename.com/?thesis_editor=1

Instead it’s going to this and it’s causing an internal 500 server error:

http://www.sitename.com/?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1?thesis_editor=1

I already checked with Thesis and my hosting company and they both determined it was being caused by the Custom Permalinks plugin.

Is there any way to stop this from happening?

I don’t have this problem on my other sites that I use Thesis and Custom Permalinks on, so I’m not sure why it’s happening on this site. 🙁

Help!

https://ww.wp.xz.cn/plugins/custom-permalinks/