Warning message on article deletion / article moving is not parsed. This results in showing plain wikitext like "'''Warning''': blah blah blah" instead of text in which all wiki-markups are parsed.
I know that it is intended to be like this because the hook "AbortMove" shows text like "You do not have permission to move this page, for the following reason:". Therefore, the text follows it should be the reason, which would be plain text.
However, this just doesn't fit with the purpose of Abusefilter. The moving is aborted not because users don't have permission, but because of abusefilter. Therefore, "You do not have permission to move this page, for the following reason:" should not be displayed, and the warning message should be displayed like message shown in onAPIEditBeforeSave(); that is, it should be parsed.