I've been using Gentoo since early 2003 and have generally been very regular (almost daily, at least weekly) with system updates using emerge . There was a period of time though when the system was on KDE 3.x and I didn't do any updates for several months. Eventually it took me a lot of effort to resolve dependencies and fix the blocked packages to go up to KDE 4.1. Being an old machine, I didn't do much on that system for the past 5 months. Now it seems like it's going to be very very difficult to any updates. Running emerge -av kde-meta:4.3 give me a huge number of conflicts and blocked package: Total: 290 packages (26 upgrades, 59 new, 205 in new slots, 228 uninstalls), Size of downloads: 556,992 kB Conflict: 272 blocks (12 unsatisfied) ('installed', '/', 'x11-libs/qt-svg-4.5.0', 'nomerge') pulled in by ~x11-libs/qt-svg-4.5.0 required by ('installed', '/', 'x11-libs/qt-4.5.0', 'nomerge') (...
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