Opening a file on the network in KDE causes the file to be downloaded (since 4.5.2), if the protocol used is not listed in the X-KDE-Protocols variable in the application's .desktop file. We therefore need to add an X-KDE-Protocols variable to all those packages that don't have it included.
Steps to Reproduce:
And these are which packages exactly?
Please file a bug per package where this problem should be fixed...