So here is the never ending story of the core 4.6 update:
Today after synchronizing my Bold and checking the Application Loader it found again an update for the Core 4.6.

Checking the details there is no difference between the installed version 4.6.0.303 and the available version 4.6.0.303 except that some modules are not installed. This was also earlier the case.
For all what it's worth, this is what versions are installed:
BB Device Manager 4.7.1.11
BBDevMgr 4.10.11
RIM USB driver 4.1.0.4
RIM serial USB driver 2.2.0.3
Application Loader 5.0.0.18
RIMProgram 1.0.0.35
On my BB Bold:
Platform 4.0.0.248
Software version 4.6.0.303
Also on PC:
Blackberry Media Sync 2.0.27
Blackberry Desktop Software 5.0 5.0.0.11
So the strange thing is:
For 2 days there was no core update (I checked).
Now there it is again! Grrrr
This drives me nuts....
Wouter