What the hell, I'm sure I was supposed to get mails when someone posted. Oh well, better late than never.
@123nick: if it's grayswandir's pack it's actually handled in a way that if that is active you get *those* rapiers, not mine. You get weapon egos from both addons tho.
I can't make it like that for all the addons since different addons to things in a different way etc. I could disable rapiers by doing a menu (I should eventually) but it's not a priority atm.
@Dracos: I actually think bunnymorphs' racials are the most balanced tree in this addon by now. It sure as hell isn't as good as Shalore or as useless as, say, Higher. It's the perfect balance.
singswords are there for, initially, just because... I planned a class around that weapon and never got around to code it. I removed them but then ogres came and they needed a bardic weapon, that's it really.
Yup, that's the first Bard song for you. Early game is pretty easy with those boosts.
For that bug I'd have to look at both your and my code and see what's happening (and who screwed up

)
All that you described is by design: both specialized trees eat your melody with sustains so you really gotta be careful with managing it at first, disabling some stuff for a bit to mantain what is best at the time, but by level 20 (or lucky drop) it all works out.
About tunecrafting, never forget to use Requiem. You stack all the debuffs you can (you got several different talents for those), then boom! You get your melody back. Or you can just, you know, get the soundshock buff from the first talent and leave it like that. As a tree it demands some investment before it truly shines. You aren't supposed to go rapier, sling and tunecrafting btw, you have to choose, not enough class points to go around.
Another good way to play it is going Tunecrafting, Cantrips, Phantasm and adding Electric later on. It makes for a weird almost-kind-of-mage vibe.
Dirty Fighting is key when you get Dashing Swordsman, you get tons of more chances of crits, so you can go on outwitting different targets (or even the same) and keep those bonuses going. The melody cost on it... I don't remember how it worked, I'll check it out. Outwits on crits should work fine (on 1.3.1) but quipster is such a complicated thing and I honestly don't remember all of it, if you're not outwitting with some crits there's a reason, buried within that description.
Melody is a small resource, I made it the lowest scaling of it all tbh, but that's all reflected on the costs too. You're not supposed to rely solely on melody with bards anyway.
About music is magic I... well, I have to add another check I guess.
@Melac: answered in the PM. Also what nsrr said, basically: some of the code I did for this addon is specific for 1.3.1 because it's some bad coding I couldn't avoid. So yeah, it's not meant to be played on other versions.
Stay tuned, an update will be coming. Eventually.