[Tracking Requested - why for this release]: I believe both bug 1643067 and bug 1645470 were cause by this. I still need to check if 77 is affected. If it is, on the next update an existing language pack will be considered compatible, and things will break very badly.
Bug 1646016 Comment 1 Edit History
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[Tracking Requested - why for this release]: I believe both bug 1643067 and bug 1645470 were caused by this. I still need to check if 77 is affected. If it is, on the next update an existing language pack will be considered compatible, and things will break very badly.