I installed Twonky on my Intel MBP, Twonky showed up on my PS3 first try, everything worked perfectly.
I decided I want to host my media on my old Dual 867Mhz PPC Mac. So I installed Twonky on that and on my PS3 the EXACT same MP4 shows up as unsupported type on my PS3.
Both of my Mac's are running OSX 10.5.4, both are plugged into the same Time Capsule router, both are trying to serve up the same MP4.
One works, one doesn't.
Twonky PPC bug?