Difference between Xpicons/Picons

Standard picons are 100 x 60 pixels, which are basically a low resolution image.

XPicons work the same as regular picons but are 220 x 132 pixels, they are HD quality, or high resolution.

32 bit are just better quality images than the 8 bit versions..

Some skins like mymetrix have a modified infobar that require the higher resolution picons.

Also on a receiver like the duo2 that has a TFT LCD screen you can really notice the difference in quality from the picons used..