Resource types

Hi there,

An instructor I provide support for is sometimes being asked to re-authenticate when he clicks 'Save Changes' after editing a web page on our 1.8.4+ instance. When he enters his username and password again, he receives the error message: 'Invalid Operation'. The changes he made to the web page are gone.

This must be a problem with the machine he is using at home, as his computer at work does not pose these issues, and most users of our system have not experienced this issue. In both home and office cases, it's an XP/IE setup. I've checked the security, privacy and pop-up blocker settings on his machine, and they all appear to be in order.

Any ideas?

Thanks,

Trevar Pearce