So I just put in a redesign, and also a reworking of the foundation upon which AB rests. Should be a lot speedier and easy to use for the foreseeable future.
One main piece that's missing is the search, but this will reappear in a few weeks.
Now that WholeNote and ActiveBass both have their base functionality back, I'll be working to improve the tools on both sites to make sharing of musical info easier.
If you're having problems with sound playback, make sure you look at the sound help page:
Should work fine in Chrome, Firefox, and IE8+. When in doubt, (re)install Quicktime. Also, there seems to be a bit of a pause (~4-5 sec) the first time you start any kind of playback, as whatever helper app your browser is using takes time to load. But all subsequent playback should be speedy.
Anyway, with such change, there are bound to be bugs, so under the 'And More' link at the top, there's a bugs/suggestions link which you can use to tell me what's amiss, should you feel inclined.