Sharepoint Services Document Library - All files read only

Hello, we have a client running windows small business server 2008. They have a small Sharepoint services site running serving a lot of document libraries.

Everything had functioned fine for months except for the last day or so.

All document libraries can be read but all of the files come up as "READ ONLY" This is not a permissions issue as the users I am using to access the site have full control over the lists.

Everything was working fine a few days ago, now "ALL" document libraries come up read only for "ALL" users and computers on the network.

I try to access the WEBDAV shares for the lists in network neightborhood and I cannot open the shares. I recieve the error "Documents in this folder are not available, The folder may have been moved or deleted, or network problems may be preventing a connection to the server"

Any idea as to what could be causing this issue? As I said earlier, everything was previously working fine... now the "read only" issue is site wide....