We have hit a problem where we cannot update to a branch we have. We have been using this branch for months.

<verbatim>
$ fossil update tai
fossil: no such version: tai
$ fossil branch list |grep tai
  tai
  tai_dll
</verbatim>

The branch has a single leaf. This command worked fine until yesterday. The latest change that may have done something is adding an event with the same tag as the branch name. We also had a double leaves yesterday late, and we changed one of the branches to "fork a new branch since this checkin" using the ui Edit button.

The current leaf says in Tags and Properties:
<verbatim>
    * bgcolor=#c0ffc0 inherited from [e6e7a07477]
    * branch=tai inherited from [e6e7a07477]
    * sym-delivered added by [401c9ad515] on 2011-02-09 02:54:05
    * sym-tai inherited from [e6e7a07477]
</verbatim>

Any idea? All our workstation fossil clients show the same behaviour (linux and cygwin).