Well, the medium size should be fine for dimensions (H x W) but was probably larger than 250KB. Images larger than 250KB get adjusted by the board software which is what happened here. I use Picasa at home and do an export at size 800 and then check the JPEG compression and adjust it until it's just under 250KB which seems to solve the problem most of the time.

Glad to hear it's not too cold yet. Sunny and 8 for tomorrow/today. Not sure I care about the temperature but it'll be nice to see the sun!