./configure generates a faulty src/Makefile on Ubuntu 10.04.
Specifically, src/Makefile's LIBS variable is missing the following:
(Or perhaps only one of them is needed, I haven't tested that.)
As a result, make generates 40 or so "undefined reference" errors when trying to link love.
./modules/sound/lullaby/FLACDecoder.o: In function
/home/hack/love/love-20100303-db7cd0682883/src/modules/sound/lullaby/FLACDecoder.cpp:47: undefined reference toFLAC::Decoder::Stream::finish()'
Adding "-lFLAC -lFLAC++" to LIBS allows love to link successfully.