Posts: 1,089
Threads: 32
Joined: Dec 2005
I've noticed this, too, but to a much smaller degree. Maybe my foam strip is different, as it clearly doesn't apply any pressure on the LCD (it's quite thin).
Another thing worth mentioning is that three of the four posts have come loose. I had to take the calculator completely apart and fix it by applying some super glue. Not a long term solution I fear, but works for now.
One problem remains: The top layer also came loose around the center, so that it bends slightly upwards, no longer keeping the key contacts reliably in place. I'll use again some glue to fix it.
My DM calculator is from a previous batch, so this problems might have been addressed already.