Had trouble unlocking the Tools of the Trade achievement on last week's Xbox Live Arcade game, Perfect Dark? Well, the good news is that Rare is aware of the problem and are working on a fix.

A series of impromptu tweets from the British developer earlier on stated that the "cause is known (save file/achievement data not fully synchronising)" and a "fix is being looked at as part of a possible title update."

Rare also offered a way to try and prevent it, stating that "prevention [is] possible by keeping the console on for five minutes after completing any weapons training."

If that's not enough, they also offered a potential fix from the Xbox.com forums for those who are too impatient to wait for an update. Unfortunately, it might be too late for some of you though, so chances are for those people, you'll have to wait patiently. Or not.

As always, we'll keep you updated.