Yes, I found another one when I was reading this afternoon. Rather than being the grammar police, I thought I'd see if one of my readers could pick out the problem in the following sentence:
Unfortunately, after awhile many of them would start acting wild and running in packs.
The first person to correctly answer will win... um, the unofficial title of "Grammar Guru of the Day." I'll just sit here and hum the Jeopardy theme song.