For logistical purposes, character inventories are now limited to 20 items total. This includes each individual piece of equipment, each individual resource, and each individual consumable.
There had previously been a planned enhancement that would allow resources and consumables to stack in containers or "bags." This idea proved to be impractical in terms of programming and has been scrapped.
Most characters fall well beneath the 20-item limit and shouldn't be affected. If you are, you have until the next event to reduce your character's inventory to 20 items or less. If you fail to do so, I'll do it for you, and you may not like the items you end up with. ;)
Wait, this means invintentory only right? No limit on stash? If I move my items to the stash will it still count toward the 20 or no?