The existing tags combo in the "add tag" dialog box could be sorter more intelligently. I'd like to see "dotted" numerical values sorted by field, i.e. instead of 0.3, 0.3.1, 0.3.11, 0.3.2 they should be sorted as 0.3, 0.3.1, 0.3.2, 0.3.11.

Also, I'd like the option to reverse the sort order so that the highest number is sorted to the top of the list, this would make it easy to add new version tags to a project.

This should probably be an option as not everybody is going to use tags the same way.