Searching "All posts" for a user

Tried this to find a post but it only showed this month's results....is it me again?

wrinx

There probably is abit of an issue with searching on username. There was a problem when the users/data were imported, and the posts weren't associated with the user. If that makes sense.
Its something that I am going to be looking at fixing as it would be nice to be able to search the old posts via user.