This week I got an email from Thijs den Hartog that he was experiencing weird behaviouor of classic reports after doing dome updates of the binaries of Dynamics NAV.
I admit .. I waited too long to update this list – sorry for that :-/ .
I realized it a few days ago, and have spent quite some time (running through +450 KB articles one-by-one ..) to update this list. Let’s just say that the routing from my home to the KB-articles at Microsoft is quite optimal now.. 
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The new Create PDF functionality is available as an option on the Print button on any report request page that prints through the Role Tailored Client once the associated hotfix (KB 2628466) has been installed.
If you have recently applied a new hotfix and start running the RTC right away, your RTC client might eventually get disconnected, and a new log on the service tier host machine can appear stating that a new Exception of type “System.ArgumentNullException” has been raised.
NAV 2009 Hotfix Release Update
Overview of Released Platform Hotfixes for Microsoft Dynamics NAV 2009 SP1 and Microsoft Dynamics NAV 2009 R2 (Partnersource link)
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