I tried to create relationship between Artist and Release. Pressing "Enter Edit"-button causes following java-script error and form is not submitted.

filename is undefined
validate_cover_art_type()666425...8b51.js (line 1)
image_position()666425...8b51.js (line 4)
event = Object

{ originalEvent=Event click, type="click", timeStamp=1330989295357, more...}
handle()c80088...c45e.js (line 67)
event = Object { originalEvent=Event click, type="click", timeStamp=1330989295357, more...}

eventHandle()c80088...c45e.js (line 57)
[Break On This Error]

....toggle(invalid);return!invalid};MB.AddCoverArt.validate_cover_art_file=function...