It's a highly-anticipated feature, but it's been causing more than a few headaches for Warhammer Online's developers. We're speaking, of course, about the RvR weapons that were one of the large features of patch 1.3.4 and have been proving rather awkward in implementation. The short version is that when prices were lowered in a recent live change, there was a bit of an unintended rush of progression, which the developers stepped in as quickly as possible to fix. The problem arose with the people who had been progressing legitimately and wound up finding themselves denied their weapons and the corresponding achievements.
The development team has posted a new item asking for players to petition the GMs in a specific fashion to resolve the issue, as well as giving some insight into what went wrong with the whole fix. In short, when they asked players to petition, they didn't ask for enough information the first time around. The statement includes an apology and an assurance that the matter will be quickly escalated for resolution. While it's been an unfortunate period of back and forth for Warhammer Online, hopefully the issue is finally resolved and players can begin enjoying their new battle-earned weaponry once again.