http://www.lemontoss.com/games/glitch/noyellow.jpg
Screenshot I took when my son mentioned that his flowers were invisible and had been for several days now. This is his herb garden in his house in Ounas Means. None of the other flowers have this issue, only the yellow ones.
I haven't noticed the issue as I don't play with herbs enough to stick around 9 hours for yellow. If it's on our end, then I apologize.
Thanks!