Link arrow remains on deleted tab

Using:

Version: 1.6.24 - 07/24/2009 08:57 11:28 (Air)
Flash Player Version: WIN 10,0,22,87

I'm seeing a problem when using a Tab Bar:
1. In a blank Mockup, add a Tab Bar with multiple tabs.
2. Link the tabs to other file(s).
3. Save the mockup.
4. Edit the Tab Bar to remove one of the tabs - say the last one.
5. Doesn't matter whether you save the file.
6. The small blue link arrow remains for the deleted tab.

The blue link arrow disappears if I go and "change" one of the remaining links. That is to say: re-linking a remaining tab to the same (or a different file) removes the blue arrow of the removed tab. It just seems that I have to touch the links to get rid of that link arrow.