On SAP support portal I can see the EXE files but unable to find PDF files to read what has been fixed.
tannx 
(BOB member since 2006-02-20)
Hi
Go to the SAP Support Portal, and go to the Downloads section, selecting the SAP Support Packages tab.
On the left hand menu, select “Archive for Support Packages and Patches”, then “Search for Support Packages and Patches in the Archive”.
In the search engine type in “FixPack 5.6”. This will bring back Fix Pack documentation relating to the latest Fix Pack, which will contain notes relating to 5.1.
Click on the icon which looks like a piece of paper with a green tick…
Jamesr60 
(BOB member since 2009-07-14)