I just set up the PS3IR-PRO with my Harmony One. All is well except that on the main PS3 menu I have the "repeating" problem -- i.e., if I try to move one notch left, right, up or down, I get sent all the way to the right (the last selection to the right), left, up or down. I went into the Harmony software and set the repeat number to 0, but it had no effect. I tried 1 also, but again no effect.
Interestingly, I don't have this problem when playing a movie -- it will operate a DVD menu just fine.