If I turn off just the IE7 popup blocker and leave the Google blocker on, I encounter the same bug. But if I turn off both popup blockers, the Snipe button works fine.
However, since I do want to use the Google popup blocker, I'll have to continue with the two-click approach described above.
FWIW, the only other bizarre problem I encountered with IE7 was that my scanner software (HP Director) didn't work anymore. I uninstalled and re-installed twice and that didn't help. The I got on the web and learned that this is due to a Javascript quirk in IE7. The workaround is simple and is at http://forums1.itrc.hp.com/service/forums/questionanswe...65003762547+28353475.