Originally Posted by bairdco
so, uh, back on target here, there's some stuff called "rim cement" that's designed for tubular bike tires which might work. you could try it on the beads of your tires, maybe that'll help.
That's a good idea—though I'd only use a small amount, I'm sure it's a pain to get off.
Also—you might try replacing your rim tape.
Usually tires shift because they're under-inflated.
You may have also damaged the valve stem area while inflating your tire (when pulling the pump off). I've ripped entire (previously undamaged) valve stems off of tires (both new and old tubes). And I have spaghetti arms. It's a fragile area of the tube.