Hi All,Long term reader, first time poster....Have recently had my performance appraisal for 2012 where I have dropped to a bottom 25% performer despite being a top 25% performer for the last four years.There hasn't been a clear message from my manager to why I have dropped into this area, and certainty no warning. All he can say is that I didn't perform as well as peers but without quoting any examples, or being any more specific...?I believe the decision may be more politically motivated rather than an actual reflection on my performance. I'm not saying I'm a top-end high flying performer, but at the same time I would've thought I would see a below average review coming. Also I'm on the cusp of Senior Consultant to Manager level, of which I 'should' be due a decent pay rise.How do I react to this? The easy option would be to throw my dummy out, resign, etc. But, I'm wandering if there is more to it, which my lack of experience is not telling me.Would appreciate if the senior heads on here could help me out.I'm prepared to leave, if I have to. But I want that to be a last resort as I enjoy what I do, and have some really good friends among my peer level colleagues. Thanks in advance...