[m2e-users] Missing Dependency

[Eric Kolotyluk <eric.kolotyluk@xxxxxxxxx>]

M2E seems to refuse to see an artifact that I know is there. In fact it 
showed it in the UI, and now it refuses to show it again.

I was missing some artifact my project was dependent on, so I loaded 
them into my Nexus repository, then I did a Maven -> Update Dependencies 
in Eclipse. It added the missing artifact under Maven Dependencies in 
the Package Explorer, and then a minute later the artifact spontaneously 
disappeared. Now there seems to be nothing I can do to convince M2E to 
put it back.

What in the world is going on?

Cheers, Eric