This is, sadly, the truth. You simply don't get true randomness from riffle shuffling, except after ~9 (!) shuffles in a 60-card deck: http://www.jstor.org/pss/2665604

Your deck will simply behave differently online and off because of this.

I'm sorry, it seems to be just those Portal cards with 's in their name, like "Nature's Ruin" and "Virtue's Ruin," that refuse to download card pics.

Bugs:
Lim-Dul's Vault is for some reason not classified as an instant
Pictures aren't auto-downloaded for looking at cards from a decklist (say, that you got online), only for looking at cards in the whole library
Pictures aren't auto-downloaded for Portal/Starter cards
Restarting the game doesn't reset the client's library/yard/exile counts until something affects them, say by drawing a card/saccing something

I love this program.

Suggestion: Mulligans

Also, it seems silly to have to connect to a server when goldfishing..

For Arch Linux users, the package can now be found in the AUR: http://aur.archlinux.org/packages.php?ID=31133

Absolutely fantastic that you're doing this. I've only played around with it briefly, but I really like what I see so far. It's already more mature than Scroll Rack, the only other cross-platform open-source MWS variant of which I am aware. Plus, it's in active development