Well, yes. Or rather, dist-upgrade is the really problematic one.

The Nokia package mangement is different from 'standard' Debian packaging due to the special way of sorting packages into those with 'Section: user' and those with 'Section: <anything else>'. The application manager will only let you install the first type, and those with other Section types have to be installed either through red-pill mode or via apt-get (as root). But some of those will collide with the standard packages, being packages used by the SDK in some cases (i.e. scratchbox, meant for the desktop development environment only).