Arpeggio playback changes

Musescore Version: r2438
OS: Ubuntu 9.10

I've been writing something with a lot of arpeggiated chords in it and It seems to me like they play back much too slowly. This is because I'm writing 8th notes but the arpeggio is playing as though it was still playing a half note. Tempo affects the playback speed of arpeggios just fine.

Also, I noticed that chords are automatically play without an arpeggio once it reaches a certain number of notes. I think this is bad for numerous reasons.

1. 16th notes can't roll a chord of more than two notes. I understand why this might happen in fast pieces, but in slower pieces sometimes the 16th notes are about the speed you would normally think 8th notes would be.

2. Half notes start to block chords at 17 notes. This isn't something you would normally see in a piece but, if anything, regular block chords should automatically become arpeggios at this point. Nobody has that many fingers!