I tried with 0.199+nmu3ubuntu3 (oneiric) and 0.204 (similar to precise, but from own ppa) with a package located at
~/packaging/pbuilder test/pbuilder_0.204ubuntu2.dsc and it build the pbuilder package both times without problems.
So, I'll mark this bug as fixed (although I do not know what change exactly fixed the problem)
I tried with 0.199+nmu3ubuntu3 (oneiric) and 0.204 (similar to precise, but from own ppa) with a package located at pbuilder test/pbuilder_ 0.204ubuntu2. dsc and it build the pbuilder package both times without problems.
~/packaging/
So, I'll mark this bug as fixed (although I do not know what change exactly fixed the problem)