My Google Maps custom overlays are not "active" anymore in Chrome and Firefox, but work fine in IE

Since a couple of months, my custom overlays appear to be disabled.

They are still visible and displayed correctly, but the link does not work anymore, nor does the CSS that changes z-index. They just seem to be drawn, and that's it.

The link is there, but 开发者_开发问答I can't click it.

This happened in Chrome and Firefox, not in IE.

Has anyone had similar issues? I've searched and searched the web again and again, nothing. However I'm sure I must've missed something.

Ok, I finally figured it out: wrong overlay layer. One is specifically dedicated to mouse events: overlayMouseTarget