they are originals extracted without converting.

im pretty much at a loss here, as only thing i ever noticed from these is the fact that tex_psn looks like it's lower quality than it's main counterpart (the one that shows up in normal XMB state)
it looks like it might have a reduced colorspace or something.

are gims always 24bit + alpha or does it come from the source png ?
im gonna try and do a reduced colorspace ones and see if that helps it.

i know it's not a space issue on the flash, or an allocated space issue on ram because I've tested with larger files and smaller files and identically sized files and whatever i could think of.

using the currently working method after you fixed the gimconv.cfg for me, the 2 images work and rest corrupt (white square)
the -ps3 switch alone makes them dissappear (wrong formatting)
using DXT5 does same as above.

.....sigh :(