Comment ID3 tag not read

Hello all,

it seems that SoX cannot read a "Comment" ID3 tag in an MP3 file, even
though it can create one. Is this a known issue?

## test Comment tag
$ id3 -l test1.mp3 
test1.mp3: No ID3 tag
$ sox test1.mp3 --comment Comment=foobar test2.mp3
$ id3 -l test2.mp3
test2.mp3:
Title  :                                 Artist:                               
Album  :                                 Year:     , Genre: Unknown (255)
Comment: foobar                          Track: 0
$ soxi -a test2.mp3

## test Comment and Title tags
$ sox test1.mp3 --comment Comment=foobar --comment Title=My-Song test3.mp3
$ id3 -l test3.mp3 
test3.mp3:
Title  : My-Song                         Artist:                               
Album  :                                 Year:     , Genre: Unknown (255)
Comment: foobar                          Track: 0
$ soxi -a test3.mp3 
Title=My-Song
$ sox --version
sox:      SoX v14.4.2

The Comment and Title tags are created as expected, as shown by
"id3 -l", but soxi sees only Title. All other tags work fine as well,
only Comment is invisible to soxi (or sox --i).

What gives?

Nicolas