Gapless playback in amarok doesnt work for me. Tried with gstreamer also, same. Its sad that one of the most known KDE application (tbh amarok was the app that made me want to switch from gnome) can't do gapless.

Then i just installed qmmp and it works fast, gapless just out of the box.

We are currently working on rewriting our "EngineController" class, which is a bit buggy.

So there is a chance that this will work properly in Amarok 2.4.