Thank you for the bump, and Ran, thank you for the promotion of Alkan's music! It is very much needed, especially now that we have the internet to raise awareness of the genius behind some of his music (especially the Symphony).
There were a few wrong notes, but the performance was still very confident, polished, and musically shaped well. I wish I could have been in that audience so I could have been a part of the enthusiastic applause an the end. Does/did Ran Zemach ever play all four movements of the Symphony? It is one of Alkan's best pieces and one of his most important contributions to the piano repertoire and deserves to be studied much more than it is. It contains some of Alkan's best music, and is some of the best "orchestral" piano music I have ever heard, period.
I have the score (not IMSLP, an actual book) with the Symphony in it, and have started looking at the first movement. It is not as technically difficult as the fourth, but is still rewarding and I intend to learn the whole Symphony.