At least on my screen (Dell laptop, Windows 7, default color settings), I have a very difficult time seeing which question(s) are highlighted on the profile favorites tab. If I guess wrong (and click a not-highlighted question, expecting to see some activity) and then go back, it doesn't help that the questions are no longer highlighted on the subsequent page load. Can you please make the highlight color more distinct from the background color?
.tagged-interesting color for highlighted questions (#ffefc6) displays fine. Any reason the favorite highlight color is different?