rrRenderingError after upgrade to 2008R2

Hi all,

After upgrading to 2008R2 some reports that ran fine on 2008 are now returning a rrRenderingError i.e. The value '1' is invalid. Valid values are betwen '0' and '1'.

There is another thread here: http://social.msdn.microsoft.com/Forums/en/sqlreportingservices/thread/c6693ff7-e407-4279-95c1-33184ebb9401 describing the same issue. Though no solution has been offered.

Any assitance greatly appreciated.

Thanks.