ReplayGain: -8.3dBWARNING: clipping occurs at the current gain. Set your decoder to decrease the gain by at least 1.5dB or encode again using --scale 0.85 or less (the value under --scale is approximate).
ReplayGain: -6.9dBWARNING: clipping occurs at the current gain. Set your decoder to decrease the gain by at least 0.4dB or encode again using --scale <arg> (For a suggestion on the optimal value of <arg> encode with --scale 1 first)
However, I think that far more important than looking for tiny amounts of clipping, you should be more interested in adjusting all of your files to make them equal loudness, using either mp3gain or replaygain. If you do this then most likely all of you clipping issues will disappear, because those files that are clipping are also probably too lound and will be adjusted down naturally to match your other files.
Is that an automated process or do you do it manually?
It destroys the relative dynamic levels of tracks per album and can ruin the whole feel of an album in my opinion