Viv,

It appears you are right on your assessment. I installed SP1 for VS2010 and no longer get the design sheet errors.

Thanks for your input.

Bob
>I've tried to repro this (migrating from VS2008 to VS2010) and cannot get the error using VS2010 SP1.
>The reason for this is simple : the Page Init is *not* now being raised at design time.
>
>Are you using the SP1 version?
>There's a lot of chaff in the link you provided. AFAICS the basic problem was that VS2008 did not fire the Init() event at design time but VS2010 did (but I can't check that) ; VS2010 SP1 doesn't.