<some_path>/<dir with long name>/<dir with short name>
And this tab is locked like in this picture:
Now if I exit from current dir with short name into dir with long name and unlock the tab, tab size will be unchanged and the whole name of that dir with long name will not be visible like in this picture:
I'm using the latest version 2007.10a in windows xp with sp2.
This problem can be solved simply by resizing tab to correct size when unlocking.