I searched the list for this issue and didn't find anything related. I have an app that saves a big file to the local SharedObject, I chunk it so I can display a progress bar, each chunk is 1M, I have 60 Meg of data. This worked flawless in Flash 9 (expected ha!), but with Flash 10, sometimes it doesn't save the data, no particular reason! I looked around the Adobe bugbase and there is already a bug (http://bugs.adobe.com/jira/browse/FP-1258), so I voted and commented on it.
Well, if you want the local sharedobject to work, please vote!
