It sounds like a text problem Zu. You may need to make a font adjustment under "Adjust the font used for text on tabs". Reduce the font size here until you can see the tab's full name, maybe size 8, then gradually increase the font size one point at a time to an acceptable size.
Certain fonts sizes, the physical length of the tab meaning you may have to pull it open a bit further to the left or right, the length of the tab's name and tab's style causes the text on the tab's name to word wrap and literaly abbreviate itself, in this case what you'll see is something like "App..." instead of the full name "Applications".
I hope this is what you're trying to do...
Good Luck;
Cp