I made an upgrade for QVS from SR2 to SR5. Trying to fix a problem with document CALs. Well the problem is gone, but now there is a new one. Hitting the "reload now" button for the documents doesn't work anymore. Even a scheduled reload does not work. The "Status" of the document on the server "Status" screen says "Waiting". This lasts a few minutes and then the statusdisplay disappears. But no reload took place. I already enabled loggin on the server, but the logfiles won't say anything about a problem.
Get back to SR4 only if your server isn´t a Windows 2008 R2 64 Bits. In this environment SR4 has some problems with scheduler. I heard that in Windows 2003 or Windows 2008 initial release, there is no problems with SR4.