The usual apologies for if this is known etc, a search for 'flicker' came up with nothing and 'flash' was swamped with Adobe Flash mentions, so... Anyhow, I've noticed that there is a certain sweetspot at the bottom of a card (both yours and the enemy ones) that if you leave your mouse still on it, it causes a repeat trigger of the grid display (as in, highlighting where you can move, attack etc). Looks like its due to the slight raising of the card when you hover on it - hover at the bottom, it shows the grid display, raises the card to ABOVE the mouse, so it cancels the grid display and drops the card again, where it gets under the mouse which activates it again... though weirdly on the enemy cards it isn't the very bottom of the card that does it, but slightly higher up, so go figure. Not a major issue or anything, and certainly has an obvious solution ("It hurts when I poke it!"; "Well... don't do that then.") but figured it may be worth a mention.
