[quote name='norvegicusbass' timestamp='1340469368' post='1704946']
After a hell of a long layoff from playing
...
Anyone else plagued by mistakes?
[/quote]
Here's my take. YMMV.
From the look of it, my first guess would be that your brain needs to be reprogrammed again. Larger parts of the brain than available now need to be programmed for this job. Only concentrated practice will do that.
As always, do not practise at full speed, or practise for speed. Practise for correctness. Thus you press the brain to set apart more cells for this, and the brain processes thus get stronger and quicker. Sadly, there's an age aspect here, but happily even old brains can still learn.
Of course you know that getting inhibitied or similar is not helping, so you'll need to find ways to do away with it. You know yourself best, but an example might be to keep telling yourself that making mistakes is both OK and temporary.
Maybe not related to your case, but I feel there's a devil in practising too early at full speed, as is often done when one plays along the CD track. Each error gets programmed, each negative feeling about errors gets programmed. It's simply not the way to do it, and very inefficient.
Since I'm on a rant at any rate, here's an alternative approach that some might benefit from. It can be trained, and I would advise doing it on one song only, to start with.
How about just reading the part without playing it, again and again, thinking through what the part needs to convey and how it should be played technically (which finger when where how), making notes in the score/tabs, and producing stronger and stronger mental images of you playing the song. Again: [b]slowly[/b].
For every concert I needed to prepare back when I was a musician, I would have one piece that was trained like that whilst I was commuting by train. I'd need three to six months to build a concert program, but that one piece would only be physically played during the last week or so, just to check and iron out stuff. My fingers (the brain really) were already programmed before that last week.
I hope this can be of help to you or someone else.
Good luck!