Top of page disappears on Android

Hi

I am on Android 2.3.4 on a Sony Experia Mini Pro.

Accessing my email at m.zoho.com the top of of the screen is hidden and jumps back off the top if I try to scroll to make it visible. It means I can't get to the Zoho drop down to allow me to navigate between email, calendar and crm.

This happens with both Dolphin and the standard browser.

It's a showstopper.

Any ideas?

Thanks,
Mike.