EDIT:
I've just read
How To Ask Questions The Smart Way…

Ok, when right clicking on an Audio CD entry in fb2k playlist, and choosing
Utils ->
Detect CD pre-gaps, foobar2000 after scanning all tracks (beginnings and endings, I assume) shows an error, which is included in the first post of this thread.
This applies to both beta 11 and beta 12.
If you need this info… EAC shows that my Acer 40x drive has only
Accurate Stream of those three features it can scan for.
Actually I have no idea how this feature can be used in foobar2000 nor I will use it frequently, but the fact that it does not work for me…
Thanks.