I am sorry but I could not understand what exactly is your issue .
I would request you to please redraft it and say so that we would be able to assist you.
I would like to confirm that you updated to Adobe Reader 11.0.11 and now you get split PDF' files displaying in browser .
It was fine till you were on Adobe Reader 11.0.10 .Is that correct ?
Please let me know if this is the issue you are experiencing .
Also ,I would like to know the browser you are using to access the PDF .
Are you able to access PDF in Reader ?
I would also recommend you to refer the following document and see if it is relevant for your issue and help you fix it .
Maybe the users in the Japanese forum are better equipped to understand your inquiry.
[topic moved to Japanese Reader forum]