* Bugs which entirely prevent the composition of one or more of the
images required to be built for a currently-pending (pre-)release
* Incorrect checksums present on any of the required TC/RC images
(failures of [[QA:Testcase_Mediakit_ISO_Checksums]])
* Unresolved dependencies on the DVD image (failures of
[[QA:Testcase_Mediakit_Repoclosure]])
* File conflicts between two packages on the DVD image without an
explicit Conflicts: tag (failures of
[[QA:Testcase_Mediakit_FileConflicts]])
* Complete failure of any required TC/RC image to boot at all - "DOA"
image (conditional failure is not an automatic blocker)
+1