Why is it that, "The document “Untitled.numbers” could not be saved." ?

The new version of TextEdit (Version 1.7 (289.3)) can save files to our server shared folder (mini server, raid 1 array, 10.7.3) and save changes, Numbers can only save them the first time. After that

The document “Untitled.numbers” could not be saved.

Console errors like

4/5/12 12:31:53.096 AM [0x0-0x46e46e].com.apple.iWork.Numbers: [ERROR] genstore_client_managed.c:GSClientManagedStorageCreate:299 Path "/Users/Me/Library/Autosave Information/85144DE8-E041-4514-BADE-FA63ED0FA3AF.genstore.noindex" passed to GSLibraryCreateClientManaged does not exist or is not a directory.

4/5/12 12:31:53.096 AM Numbers: NSDocument could not create temporary version storage at file://localhost/Users/Me/Library/Autosave%20Information/85144DE8-E041-4514-BAD E-FA63ED0FA3AF.genstore.noindex. Here's the error:

Error Domain=GSLibraryErrorDomain Code=2 "The operation couldn’t be completed. (GSLibraryErrorDomain error 2 - The supplied path does not exist.)" UserInfo=0x3397cb0 {NSDescription=The supplied path does not exist.}

4/5/12 12:31:53.096 AM Numbers: NSFileVersion couldn't find the library for a file. URL: file://localhost/Volumes/Creek/Banking/Taxes/Taxes%202011/Untitled.numbers

Tried

Finder > (menu) Go > Go to Folder..., enter /Users/Me/Library/Autosave%20Information, got access denied

Finder > (menu) Go > Go to Folder..., enter /Users/Me/Library and select the Autosave Information folder (denied flagged folder) and add myself to the permissions list with Get Info, click lock, password, +, Me from Users and Groups, Select, and...

Now save works, but wait for much disk grinding

This computer went from 10.6.8 and jumped to 10.7.3 and I had to split the RAID 1 array it started on to get the installation to restart and complete. Hints from the installer that some features would not be available (autorecover drive) didn't hit it would leave a folder crucial to operation of Apple's own software inaccessible.

The path does exist, Panda.

Why was that folder not accessible except to system? and hidden in the normally hidden /Users/X/Library for fun? with a nearly useless error?