I changed my YAF 1.9.5.5 install to run on an ASP.NET 4.0 integrated app pool and it seems like no data is retained on postback. I then proceeded to upgrade the site to 1.9.6.1 thinking it was an issue with YAF not being .NET 4.0. Anyway, after the upgrade I'm experiencing the same problem. This seems like it's something stupid that I'm overlooking so hopefully someone can (politely) point me in the right direction. 🙂 Thanks!

I figured it out. We are using Modernizr on the site and the code was placed at the very bottom of the page, right before the closing body tag. Moving it to a different location resolved the problem.