Detailed here: Froyo Kernel Source Code - Android @ MoDaCo Acer has failed again to deliver proper GPL sources for the Acer Liquid / Liquid E, this time for its Android 2.2 release on the Liquid E. According to one of the posters, Acer is in violation of the GPL: Acer just doesn't have this together. We can't expect any better of them with future tablets either.
Coby has also ignored GPL compliance on their tablets http://www.androidtablets.net/forum/coby-generation-1-technical/10067-coby-gpl-obligations.html and continue to ignore requests, so no surprise that Acer does the same. I guess overseas manufactures don't need to comply with GPL terms...