I was able to unzip via SSH.
Here's the directory listing showing all the hidden OS X dotfiles
Code:
pi@rp3:~ $ ls -ARl /media/VFAT128/Test_mixed/Runaljod\ -\ Gap\ Var\ Ginnunga/
'/media/VFAT128/Test_mixed/Runaljod - Gap Var Ginnunga/':
total 288160
-rw-r--r-- 1 root root 4096 Apr 12 07:06 '._02 - Hagal.flac'
-rw-r--r-- 1 root root 50828096 Apr 12 07:06 '02 - Hagal.flac'
-rw-r--r-- 1 root root 4096 Apr 12 07:07 '._03 - Bjarkan.flac'
-rw-r--r-- 1 root root 37879666 Apr 12 07:07 '03 - Bjarkan.flac'
-rw-r--r-- 1 root root 4096 Apr 12 07:06 '._05 - Heimta Thurs.flac'
-rw-r--r-- 1 root root 25560782 Apr 12 07:06 '05 - Heimta Thurs.flac'
-rw-r--r-- 1 root root 4096 Apr 12 07:07 '._06 - Thurs.flac'
-rw-r--r-- 1 root root 7058789 Apr 12 07:07 '06 - Thurs.flac'
-rw-r--r-- 1 root root 4096 Apr 12 07:06 '._07 - Jara.flac'
-rw-r--r-- 1 root root 33413389 Apr 12 07:06 '07 - Jara.flac'
-rw-r--r-- 1 root root 4096 Apr 12 07:06 '._08 - Laukr.flac'
-rw-r--r-- 1 root root 25896996 Apr 12 07:06 '08 - Laukr.flac'
-rw-r--r-- 1 root root 4096 Apr 12 07:06 '._09 - Kauna.flac'
-rw-r--r-- 1 root root 15695223 Apr 12 07:06 '09 - Kauna.flac'
-rw-r--r-- 1 root root 4096 Apr 12 07:07 '._10 - Algir - Stien Klarnar.flac'
-rw-r--r-- 1 root root 27793978 Apr 12 07:07 '10 - Algir - Stien Klarnar.flac'
-rw-r--r-- 1 root root 4096 Apr 12 07:07 '._11 - Algir - Tognatale.flac'
-rw-r--r-- 1 root root 35832635 Apr 12 07:07 '11 - Algir - Tognatale.flac'
-rw-r--r-- 1 root root 4096 Apr 12 07:06 '._12 - Dagr.flac'
-rw-r--r-- 1 root root 34056239 Apr 12 07:06 '12 - Dagr.flac'
-rw-r--r-- 1 root root 4096 Apr 12 07:06 ._cover.jpg
-rw-r--r-- 1 root root 117508 Apr 12 07:06 cover.jpg
-rw-r--r-- 1 root root 4096 Apr 12 07:06 ._extra
drwxr-xr-x 2 root root 32768 Apr 12 07:06 extra
-rw-r--r-- 1 root root 4096 Apr 12 07:06 ._folder.jpg
-rw-r--r-- 1 root root 145320 Apr 12 07:06 folder.jpg
-rw-r--r-- 1 root root 4096 Apr 12 07:06 '._Runaljod - Gap Var Ginnunga.lfml'
-rw-r--r-- 1 root root 343 Apr 12 07:06 'Runaljod - Gap Var Ginnunga.lfml'
-rw-r--r-- 1 root root 4096 Apr 12 07:06 ._Thumbs.db
-rw-r--r-- 1 root root 23552 Apr 12 07:06 Thumbs.db
'/media/VFAT128/Test_mixed/Runaljod - Gap Var Ginnunga/extra':
total 128
-rw-r--r-- 1 root root 4096 Apr 12 07:06 '._Runaljod - Gap Var Ginnunga.cue'
-rw-r--r-- 1 root root 1603 Apr 12 07:06 'Runaljod - Gap Var Ginnunga.cue'
-rw-r--r-- 1 root root 4096 Apr 12 07:06 '._Runaljod - Gap Var Ginnunga.log'
-rw-r--r-- 1 root root 11728 Apr 12 07:06 'Runaljod - Gap Var Ginnunga.log'
Heres some screen shots showing thumbnail and cover for the real album and a second bogus copy of the album/tracks corresponding to the OS X dotfiles.
I'm not sure why OP is not seeing any cover or thumb for the album but it does not appear to be related to the presence of the /extra subdirectory.
My recommendation would be to use a utility or script to remove all the hidden OS X dotfiles and dotdirs from your music collection. This is best practice.
In upcoming moOde 6.5.0 the thumbnail generator has been improved to run in parallel with MPD db update to provide an integrated "Update library" process instead of separate MPD and thumbnail updates. To do this though required changing from MPD's directory listing which would honor .mpdignore to a Linux directory listing which would show all of the OS X dotfiles.
"TheOldPresbyope" , we may need to add some additional filtering to listall.sh script ???
-Tim
