How should we handle multi-screen bug reports?

[Nate Graham]

I've noticed that we have multiple places where people submit 
multi-screen bugs:

1. Plasmashell | Multi-Screen Support
2. KWin | multihead
3. KScreen | [random components]
4. Random other places related to whatever particular product is broken 
with their multi-screen setup (e.g.  Plasmashell | Panel for a bug about 
panels doing unexpected things)

It's pretty hard for me to know which piece of code a multi-screen bug 
belongs to, so I'm not sure where I'd file a multi-screen bug myself. 
Evidently our users have the same problem, judging by the number and 
quality of the bug reports in these products. This also makes it hard to 
triage bugs, with the result that we have over a hundred multi-screen 
bug reports most of which are un-triaged and un-prioritized.

What should we do about this?

Nate