Just filled out my ballot today, but had a little trouble sealing it in the security and outer envelopes. Turns out my ballot was delivered during a thunderstorm, and got a little soggy. Both of the two envelopes were sealed shut. I sliced them open as cleanly as I could, and glue-sticked them back closed. But they clearly look like they've been opened before, so I hope that doesn't spook anybody at the elections office.
Not a tragedy, but you know, it does rain out here, and mail does get wet. So maybe those self-adhesive envelopes would be a better idea?