Another annoying thing:
When in iTunes settings, on the tab "devices", the checkbox "prevent automatic syncing" is off, then
you can activate or deactivate the checkbox "open iTunes when this device is connected" on the overview tab when your iPhone is selected in the left pane of iTunes.
What I always had is the checkbox activated there (open iTunes), but I had checked "avoid automatic syncing" in the settings.
When I now check "avoid automatic syncing", then the theckbox to open iTunes automatically when the device gets connected is not only greyed/unselectable - moreover, the checkbox is then always OFF.
I am pretty sure that before this wasn't the case - iTunes would always come up, but not automatically start syncing (which is important, as there might be something you want to change BEFORE some app gets overwritten or similar).
I really begin to HATE that software.