Why Is One Of My Select Dropdowns Disappearing Once Content Is Loaded Below It?

I have three tabs that sport a select widget; selecting an item populates the contents of the div below. In two of the three cases, all is fine; in the third, though, the dropdown

Solution 1:

I'm not sure, but I'm going to guess that your dropdown is still present - it's just sitting at the bottom of the page, since it's on the same line as your big div, and inline blocks will align their bottom edges by default. The others are working because they're wide enough to force a line break, but your narrow music div isn't. Try changing your content divs from display:inline-block to display:block to force them onto separate lines, or add clear:both.