Scrolling or Page Down In new version of web interface InBox not functioning

Scrolling or Page Down In new version of web interface InBox not functioning

I can use the scroll function or page up/down buttons to navigate my inbox (> 100 emails) in the older version but in the new version I can get neither function to work.

My O/S is Windows7 and I use Opera has my default Web Browser. 

I did try Firefox and it worked so it is an issue with Opera and the Web mail interface.