T5 bug with first line of message catalogs

[Blower, Andy]

I just ran into a T5 bug where the first line in a message catalog never 
returns a translated version. I'm sure I dimly recall encountering this before 
and I'd like to check on the status, can anyone remember / find a bug for this 
issue. I tried searching and couldn't find one, so maybe I encountered it but 
never raised it?