Expand button showing documents linked to virtual item not appearing in Explorer

Hi Bentley & Forum,

I have a user who does not see the lttle expand plus sign next to virtual items in Explorer. Her eB account looks OK as far as I can see. I logged into eB on her machine, with her logged onto the machine, and that was fine so it suggests her machines and profile loaded onto the machine is OK, so it's not the software or her Windows profile on the machine or temp files or something. She has had it for ages. It isn't affecting many others that I am aware of. I am not sure what is happening. Can you please shed some light on it? Thank you in advance.

Best regards,