About 4 months ago I got my car alligned b/c my tires were wearing badly on the inside and I got it alligned and it has been fine.

Well, about a week ago I noticed some uneven wear on the outside of both tires. Did my car get knocked out of allignment or could there be another problem?

 

Generally too much wear on the outsides signifies too much toe-in. If the alignment wasn't long ago, I'd take it back and complain.