I just saw someone on the Help boards asking how to remove one of Rachelle's parts, so I assumed it was working as I never saw this feature before. I just tried getting a "Missing Jaw" replacement and even though it shows my base wearing it in her page, the wardrobe and my actual HA won't reflect it. I tried it twice and it took my sP both times. Also all images for the "right arm" are broken. I tried clearing my cache but it didn't help. I'm sorry if this is a known issue, I looked around and couldn't find any reports.

some screenshots

[edit]I made this board and tried to use the replacement on 05/22 - today at 05/26 when saving a new avatar the replacement showed up (not the first change I make after the first report).

Rachelle's replacements won't show in the wardrobe because they're considered hexes, and there are no plans (as I've been told by Keith) to integrate the feature with the new wardrobe right now. Which is a shame because I did use them a lot, but now it's quite the hassle.

Nonetheless it should show on your live avatar on the site, just not in the wardrobe. I was able to get Right Arm: Boiled Over right now.

eta: Source about Keith and the replacement limbs, my post that he was replying to is directly above it.