Mine gets crud in it and sticks up. Not a big deal to me because, hey, as everyone knows: #1 "A gun is always loaded". I figure once it's really stuck it's time to give the slide a really good cleaning, too. Could always take it out and narrow it a bit, reducing the tolerance on the sides.
I've been tempted to take mine out altogether but, then I might get DQ'd for disabling a safety "feature".