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Changes between Initial Version and Version 1 of Ticket #17576, comment 3

initial	v1
6	6
7	7	My Linux system / distro does not ship with the necessary libraries and other tools necessary to build vbox, otherwise I'd test this out myself.
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	9	'''EDIT'''
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	11	After viewing the same source file above in version 5.2.6 (the last time the window class was setting correctly), it appears the X11 window class code was moved in 5.2.8 from the beginning of `prepare` to the end. This appears to be the reason for this issue.