I have two Palm Pre's. As you can see from the attached pics, the Palm Pre with webOS 1.4.5 (and is a used unit that hasn't been re-imaged with a fresh doctor) has 6.68 Gb capacity. Whereas the Palm Pre webOS with 188.8.131.52. (which has been recently doctored) only has 4.67 Gb capacity (a 2 Gb difference). Using Device Information on each unit provides the same numbers. (Please bear in mind that I'm addressing capacity, not available space.)
Regarding the Linux command line shots, I must confess that I'm Linux-illiterate. The answer may be right in front of me but I don't know enough about Linux to see it.
At any rate, why the variance? Is there perhaps a second partition on the one that seems to be lacking 2 Gb of space? If so, is it possible to delete that partition via Linux? Thanks!