Outlook Web Access is frozen / not interactive in Internet Explorer 10; the usual main screen listing e-mails in the inbox is visible but clicking on links and buttons has no discernible effect at all. I have no such problem in Firefox or in Internet Explorer 8.
So far I have tried adding the domain to the list of trusted sites, and turning down my security settings. Neither has had any effect. There is no obvious indication of, for example, pop-ups being blocked.
EDIT: NB - the version of Outlook Web Access in play was version 8.3