The current git build don't saves the lyrics in file, if the helps it was an mp3 file.
I builded amarok a few days ago.
The current stable works fine.

I tried to start amarok with --debug to get more output but nothing about this happens.

Anything I can do to give more infos?

Did you check the difference in the debug output compared to the released version? That would certainly help to narrow down the problem.

Also please file a bug about this on http://bugs.kde.org, we do not track bugs in the forum.

>Also please file a bug about this on http://bugs.kde.org, we do not track bugs in the forum.
I know but first I wanted to get more infos.

I noticed embed lyrics wouldn't readed at all no output from taglib there.

I also noticed covers from certain albums I my playlist wouln'd shown when I restart amarok:
1. Fill play list with music.
2. see covers
3. restart amarok
4. many covers missing.

EDIT: bug "created": https://bugs.kde.org/show_bug.cgi?id=348244