Q: Cannot create or save files in Apps that use file sync to iCloud

Frustrating problem!!!

Any Apps (third party AND Apple) that have the option to sync data and/or documents to iCloud will not function properly on OS X 10.8.3.

Generally I am waiting for release of 10.8.4 to see whether this solves the problem, however...

In the case that anyone else has suffered this problem and knows a solution???

Some information...

The issue is directly related to how each of these Apps manage new and existing files - to be clear - some of these Apps function, will allow the creation and saving of a new file - however this is dependant on when in their code they approach iCloud services for information on cloud based documents. As soon as the App approaches iCloud for information, the App hangs.

If I switch off "Documents & Data" in iCloud System Preferences, and using Terminal rename (quarantine) the folder ~/Library/Mobile Documents, all Apps resume normal function, however obviously without the ability to sync to iCloud. (Note Terminal is required to perform this task as this folder "Mobile Documents" causes Finder to hang.)

All my iOS devices operate normally with iCloud sync, and I continue to use the iOS versions of the Apps on my iOS devices.