This is getting interesting. Reports from people at the scene say that Joe told reporters he returned the contribution from Wal Mart PAC. There's no record he returned it on his FEC reports, but then again he apparently never reported receiving it, either.
Even more interesting, it seems that Wal-Mart disclosed sending him the PAC contribution, but they have not reported getting any refund from Lieberman.
I'll be offline for the rest of the afternoon, unfortunately. If you're interested in this story, join the team of sleuths in the Firedoglake reader community. More details and links and sources over there for your sleuthing pleasure!