Okay I see your ran the rebuild scripts. But also I see your real issue appears to be the islands.
So the next step would be to clear cache.
And by that it may be a extra step since you were hosed.
So what I would do is ftp to your cache folder delete all files except for the htm html files.
Then run the clear cache utility in the ubb control panel.
That will rebuild the scripts for your islands and ensure that they have all been rebuilt.
That might get you closer on target.
Next item might be the sessions folder. But that should not really be a issue. Unless you have hundreds of files there. But a browser cache could also be a culprit.
