LAME v3.93 Changes:
Bit allocation for pre-echo control improved for single channel encodings
Substep noise shaping
Optimizations by changing data structure
Noise shaping model 2 fix
Nspsytune FIR filter clean up
Fix small psymodel bugs
Portability fixes for Tru64 UNIX
Some fixes in the DLL
Fixes for channel scaling in mono mode
Some optimizations and a faster log10 function
Some tag related fixes in the direct show filter and in the ACM codec
Fixed a mono encoding bug found by Justin Schoeman
Update to autoconf 2.53, rewrite some configure tests
Determine gcc version even with gcc 3.1
Compile shared libs on BeOS (and perhaps other arches)
Ultrasparc switches for gcc 3.1
Portability fixes for SunOS 4.x
Some fixes for VBR

And you can get it HERE