@mrrhq,

Welcome to TMO!

Although I get the impression that you more-or-less know what you're doing, I would advise you to treat extras-devel with EXTREME care.

This is not Debian. Packages in extras-devel are in development, and anyone can upload anything that "upgrades" (read: fvks up) critical system packages in the worst imaginable ways.

Normally you enable extras-devel to install a single package, and then disable it.

NEVER do apt-get upgrade with extras-devel enabled.
NEVER do apt-get dist-upgrade under any circumstances (extras-devel or not).

I repeat: this is not Debian!

Enjoy your N900!