This appears to be a Testtool issue only which breaks ever once in a while.
Affected Test: f_basic_modules.bas:::tBasicIdeModuleNames

- The test opens the context menu of the tabbar and selects the item "Rename"
for the current tab.
- An invalid name is entered, followed by <ENTER>
- The messagebox comes up (Invalid name warning) and is closed with <OK>

Now the focus is back to the tab with the invalid modulename. Pressing <ESCAPE>
should undo the changes to the tab, set the old, valid, name and leave editing
mode. No problem doing so manually.

For the Testtool this works fine on Windows but has failed for a long time on
Solaris and on Linus as well lately.

The sequence is:

Kontext "Tabbar"
Tabbar.typeKeys( "<ESCAPE>" , true )

Instead of reverting to the old modulename the testtool just tries to leave the
entryfield and thus the warning for the invalid modulename comes up again which
makes it impossible to reliably get away from the entryfield.