When you hear hoof beats, you naturally think horses; but it could be zebras!

The two might not be connected at all; the yellow coloration of your Meyer is more likely the result of a change in light conditions. If you can post pictures, we could give you much better answers.

I wish I'd taken pictures! I was so freaked out by the possibility of contagion that I threw the diseased leaves away.

Previously, some of the lemon tree leaves had yellowed due to changing light conditions, and that looked totally different. When it was light-related, the entire leaf turned sort of a pale shade of green/yellow.

This discoloration was more like... more light brown then yellow. And instead of the entire leaf turning a pale color, it was more like a part of the leaf had turned a strange "dead-looking" shade of light brown.

I'm hoping it doesn't return, but just in case it does, I'll take a picture and post it.

Any ideas on what that brown/black spots on the bay leaf could be?

My expertise is pretty much limited to Meyer lemons. Try asking your question on the "Trees" forum; they will also ask you to post pix; but someone in your area might have the same issue and have the answer without photos. Is your tree a Lauris Nobilis? Also, it is always valuable to know where you are located.

Do these leaves look anything like yours? My tree was loaded with blossoms and now is loaded with developing lemons, but I have a few of these leaves. Should I be worried? What should I do?

Jean, you may want to make your own post so it gets more exposure.

The lemon recovered, but about half of the bay leaves continued to brown. I still don't know what happened to it.

I just posted similar pictures for a gardenia, planted next to a bay tree. I hope you don't mind my posting here but the bay tree is a common denominator. Please take a look at that post. It looks similar and I think I see a borer on the underside of my leaf which, unfortunately, I did not see at all when I took the picture. I'll investigate further tomorrow.

http://forums.gardenweb.com/discussions/3721124/whats-killing-this-gardenia