IE rendered report ssrs 2012 shows a horizontal scrollbar and only part of the report is visible.

Hello,

I have a problem with my reports being rendered strangely in IE (9,10).
They are created in SSRS 2012 on a SQL 2012 db.

When I preview them in Visual Studio, they render perfectly.

There is a small scroll bar in the active IE window (no, it's not the size of the screen, that's more than large enough)

All works fine in FF or Chrome.

What can I do to solve this?

Thanks in advance,

Peter