Confirmed... Using Yahoo and batch download is working fine in small chunks. Apparently you're pulling them too quickly now, and Google is shutting you off. May be worth detecting and pausing the download vs re-trying. :P

And popping up a display warning about changing tile service may be nice too.

Looks like off-line loading is working correctly now from the yahoo sqlite db after grabbing the areas I needed. Finally I'll be able to navigate those areas with poor cell reception without issues!