Google Webmaster Tools seems to have a new bug which does not allow you to delete or remove your sitemaps file from your profile.

Several reports came from Google Groups starting on May 27th. All have reported that no matter what they do, the delete function does not actually remove the sitemap from the associate site.

The first report said:

Googler, Susan Moskwa, replied saying they are looking into the issue:

On a similar note, a WebmasterWorld thread reports that Google seemed to have merged two of his sitemaps files into the same domain. I.e. He set up profiles for subfolders, so he can manage each subfolder, which Google recommends. Google seemed to have automatically merged those two sitemaps under a single site. Which begs the question, how do you delete part of your site using Webmaster Tools?

Finally, a DigitalPoint Forums thread is reporting a backlink update in the link tool within Google Webmaster Tools. As an FYI, that tool does update every few weeks.

Forum discussion at Google Groups and WebmasterWorld and DigitalPoint Forums.