Wanted to mention this only happens to me on the mobile site using an android device. When I'm using the full site on a desktop, I've never had the issue.
I just had my forum tab close and a new one open (can't use back to go to previous page) and the URL displayed was ody://neverblue_android_t1
Yes, ody, looks like a typo as no actual page was loaded. Hope that helps.