Yay, I just disabled LastPass plugin in Safari and I'm back in business!
Funnily enough, snippets have just stopped working for me too. They were working in the 3.0 beta I installed a few days ago, but when I upgraded to the official 3.0 they stopped. I've checked accessibility etc and rebooted Alfred and so on but they are now refusing to work. I'm a long-standing user of text-expanding and am hoping to dump aText when I get Alfred snippets working again. Thanks, Nik