the mod works fine with "special" prices - however, it has issues with sale prices. I'm not sure why that is but here's the easiest solution - temporarily take off the sales.. upload your feed.. wait until its approved, then restart the sale. google only really crawls it while in the processing mode, and then won't check again until you resubmit. The only downfall of this is that the regular price is shown on Froogle and not your sale price.. so you lose out there

In regards to the label attribute.. are you running the latest version of this mod (from Andrew's web page)? I'm not sure if he's fixed this attribute thing or not.. i'll probably have this issue on the next upload