This is taken for phpbb.com, is it cause for concern? It might interest you to know that phpBB 3.0.7 -> 3.0.8 was historically the longest it took for a minatenance release, taking a gargantuan 8 months, 23 days. This excludes the release of 2.0.23 (1 year, 1 month, 25 days) which didn't really count since 3.x had been in development and had its gold release several months before. It is now 6 months, 22 days since 3.0.8 was released. This is where the project stands in terms of 3.0.9-RC1. I'm sure we can all draw our own conclusions from that.