Preamble
Create a portal in the overworld with a dropper on a clock to throw items through the portal into the Nether. At the corresponding loc in the Nether, create a portal and seal off both faces with glass or whatever. Directly underneath the portal's floor, place two minecarts with hoppers to retreive the items, on tracks.
What I expected: Carts retreive items as per items on all other block types.
What I got: Items bob on portal floor.
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases. If this has been done, we can reopen the issue.
Keep in mind that the "Resolved"-Status on this ticket just means "Answered", and that we are waiting for further information on whether this issue still exists or not. We will reopen it as soon as the requested information has been delivered.