As in, if he doesn't reload Special:Translate after changing a message, the "Accept" button is still there, can be pressed, it says that the translation has been accepted and the action is logged.
This has no real consequences as the extension will correctly report the translation as unreviewed.
Might be related to the fact that the review is logged as action on the page rather than on a specific revision as mentioned on bug 34153?
Example:
https://translatewiki.net/w/i.php?title=Wikia%3ADump-database-info%2Fit&action=historysubmit&diff=3697310&oldid=3696533
https://translatewiki.net/w/i.php?title=Special:Log/Nemo_bis&dir=prev&offset=20120216120848&limit=1&type=&user=Nemo+bis
Version: unspecified
Severity: trivial