Hi,
I had the same problem and ended up creating images to replace the text. You need to leave the title in place and set TabView="ImageOnly" then set the IconUrl path to you image:
IconUrl="~/images/log/icon/ae.gif" TabView="ImageOnly" Title="Add/Edit"
This allows the title to show in the slider header but not on the tab.
I was really happy I did this because it made the grid/splitter environment more engaging.
Heath