Doctors Without Borders, the international relief charity, is under criticism for an ad it has run — and is using the opportunity to get involved in a debate with both supporters and detractors, notes Give and Take, the Chronicle’s roundup of the most-interesting blog posts about the nonprofit world.

Plus, in our daily digest of noteworthy posts, the highlights include:

• A plea for the nonprofit world to pay more attention to the debate over American immigration policies.

• A look at foundation grant making after Katrina.