Unable to select account

[NickD]

Hi,
We are running Version 3.5.1e.
I find I am unable to make a link between, say, a contact and an account, or an opportunity and an account. I can open the selection window, and search but not select. This is obviously a major problem as the account is often mandatory.
Has anyone else had this experience?
Thanks for any advice.
Nick

[NickD]

Problem solved by moving to Firefox.

Sorry for missposting this question.

Cheers,
Nick