New steam market fees?

I would say it has been always 2 cents: 1 for the developer and the other one for steam.

It's a % of the price. So the higher the price, the higher the fees.

I guess they're handled seperately now and since there are no 0,... values, they count 1 cent for each. But I don't know when they changed it.

When it was 3 cents, it was 1 cent for the item, 1 cent for the dev, and 1 cent for Valve.
It's still that way, as far as I know.

Nope, you just see item prices increased. There seem to be plento of 3-cent backgrounds left on the Steam part of the Steam store. They haven't changed the 10%/5% system for a while.
Although I find it a bit of pretentious that they charge a 10% game transaction fee on their own goddamn game, meaning they increase their own cut form 5% to 15% just because.