A new version of the Łowcy Gier forum was launched last week. It was supposed to be a simple upgrade of the phpBB engine but it turned out to be a complicated and painful process. The problem was both the big jump between versions (from phpBB 3.0.x to phpBB 3.2.x – it could not be upgraded directly to the target version, we had to upgrade to phpBB 3.1.x first) and the number of plugins and modifications installed on the old forum that needed to be migrated (none of the old extensions was compatible with the new version of the forum engine, and most of it doesn’t have any compatible replacement) or at least clean their remains (plugins modified the database, which conflicted with new extensions). You can read more about the process here (Polish only).