Recently installed Inventor 2013 before Holiday break (mid December). In assemblies, when importing nuts, bolts, screws, etc, from libraries and after inserting items in place and then save & close program and bring file up later or next day, these items are missing from the assembly. Error messages appear in the browser. It seems to be doing this on more than one computer.
"Multi problems" ?? It's not that bad, you have a file path issue to the content center files.
Did you set up a project?
How did you send the assembly to the other computers?
Was is on a shared drive? If so then map the CC location to a shared folder, this way everyone will have access to all the cc files.
If you copied the files, rather do a Pack n GO, this will ensure that all files have been collected to allow the assembly to open correctly.
What I do to solve the issue is to re-map the default CC location, it makes it easier to syncronise the folders if you don't have Vault.