re Daniweb it probably shouldn't have been pandalized in the first place. Dani did a few things probably, but Google also tweaked the algo to fine tune and reverse some false positives.
Shatner , that's correct , I was questioning how far you had gone. Have you had a 3rd party give you feedback on your site - maybe someone out of Panda, or not effected by it? It may help challenge your perspective a bit and give you a bit of light to aim for.
Nobody can be 100% sure of things with Google - it's way too complex, and this is challenging as the sites that came out , went back in. The algo is not perfect either as was demonstrated by Dani's first fall.
As Eric Schmidt half joked recently about Google's attitude to their commerical environment and G's dominant algo position over webmasters " it's our business secret".
You just have to persist and look for clues, albeit tough. And if there are any successful turnarounds out there, it's pretty skinny and folks aren't sharing enough. But we have some objective responses coming through and i think that can only help.