Flatten first and then concatenate, that's what my crystal ball says.
You don't give details on your original PDF or the way you are
concatenating them, when they are filled, etc.

Paulo

> -----Original Message-----
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On 
> Behalf Of Tobias Meier
> Sent: Monday, April 14, 2008 10:30 AM
> To: Post all your questions about iText here
> Subject: [iText-questions] Strange visualization/printing 
> problems inAcrobat (Reader) 7
> 
> Hi,
> 
> i experience some strange behaviour after i concatenating and 
> flattening
> a pdf.
> In Acrobat Reader 8 all works fine but in Acrobat Reader 7 (.0.9)
> sometimes the content of the "ex"-form fields is gone.
> It is just sporadic - meaning if you scroll down and up several times
> the text/checkboxes/radiobuttons/buttons (everything is affected)
> sometimes appear/disappear (and sometimes is half-cut). In Acrobat
> (Reader) 8 i could not reproduce the problem. But since some of our
> clients still use 7 we have to support it...
> Printing is also affected - the cross of the checkboxes and the text
> appears somewhere on the page but not in the right place. Does anybody
> know what's going on?
> 
> I attached the PDF and Screenshots of the missing content.
> 
> Thanks for helping,
> ToM
> 
> OriginalWithAnnots.png - what the original should look like (with some
> green annotations made by me for explanation purposes)
> 


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