I noticed a difference in the way 0.4.3 and previous builds treat fixed arps. Previously fixed arps would play through the macro and then end on the input note, unless a loop point is specified. Now the arp sticks to the last note in the macro, which makes using fixed arps as drum+note instruments impossible.
I suspect this might be a undesired behaviour introduced in the last build, and not a new implementation of this feature.