Thanks for replying! I use 2 different configurations.
(1) Mac Pro and a Mackie Onyx Firewire, using Logic Pro 9.
(2) An iMac using a M-Audio Midisport 4x4 interface. Same pedal issues on that Mac using either Logic 9 or Logic Express.
I use 2 different pedals, a Yamaha and an MGear.
The only difference between the 2 setups is that on the iMac, the value of the 4 Pedal On are all 127, Pedal Off, all 0's. With Logic on the Mac Pro, the 4 values of On and Off are, say, (Pedal On); 2, 26, 80, then 127. Then the Pedal Off values will be, say, 120, 80, 24, then 0.
I hope that made sense. And I'd MUCH rather have too much Pedal Data than no Pedal Data! I've read in some discussions that some people have been unable to make their sustain pedal work at all, so I am thankful mine is working. Just annoying and time-consuming to delete all the extra Pedal data.