Are you using the
latest version of GPS Log? (2.5.2)
I just did a test now using 2.5.2, exporting to KML and I
was able to see my photos in Google Earth.
On the export screen, is "Include Photos" set to "Main Only" or "All"?
are you able to forward the email with the KMZ attachment to support (at) gpslogapp.com so I can check it?
Cheers,
Will