I'm in the process of rebuilding OptionTree as we speak. I had mentioned on twitter that I would be ready for beta testing last week and that milestone was sadly missed. However, I have not stopped working to get an updated version out to you guys ASAP.
I'm re-building the plugin from the ground up using the settings API so it's more compatible with WP. As well, I have to write new docs, test compatibility and so many more things I don't want to get into right now as my life literally revolves around OT 2.0. Anyhow, I'm one guy building this thing so I apologize for not coming on here earlier to comment and give you an update, but it's getting worked on and the new version shouldn't have any of the issue of the previous one, as they are completely different but still compatible.
The realistic release date for 2.0 is more like 2 weeks from today because I'm taking every effort to not break a single person website during the upgrade. Again, sorry for the delay.