xmessage "Test Message" does not display the test message, and segfaults if
a key is pressed while the display box is selected.
If you increment 'height' by one after makeform.c:274 executes, the message is
displayed. Widget bug?
Seems to be fixed in XFree86-tools-4.0.2-6
*** Bug 18495 has been marked as a duplicate of this bug. ***
Yep, this is definitely working correctly in the latest rawhide I'm using.