🚀 go-pugleaf

We are running a Linux server and I have recently upgraded to a Nehalem Mac running Leopard 10.5.6. I also upgraded to Illustrator CS4 and since these upgrades I have been getting on-and-off error messages:

1. When I double-click a file on our server, I occasionally get:

'Can't open the illustration. The file is locked or in use. ID = -54"

When I double-click the file again, it opens fine.

2. When I am in CS4 and saving files to the server I sometimes get either:

'This file has been modified outside Illustrator. Do you want to continue?'

or

'Can't save preview, but all other information was saved successfully. The file ended unexpectedly. Try using a backup copy. ID = -39'

or a combination of both.'

Sometimes I have to try saving 2 or 3 times before the file saves successfully.

Has anybody had similar experiences?

Thanks
Sean