pushing the enter key in the filter field moves all found titles to the playlist.
i often accidentially push enter as my habit. with a large collection, the some thousands found titles needs minutes to transfer to the playlist.

is there a way to disable the enter key in the filter field, or just to forbid the transfer to the playlist?

iirc, there was a limit added to prevent more than 100 tracks being added at a time - not sure if this still exists - you don't say what version of amarok you're using.

it's 1.4.9.1 build date 23.4.08 (ubuntu-hardy amd64)
toggling the enter behaviour in the preferences for filter field would be really practicable - i don't need 100 songs in the playlist when i just start to refind my search