you probably have another cb somewhere.
You mean as another instance? or another variable name.
Well, I double and triple checked the fla and there only seems to be one instance of the combobox in the project. Any other ideas on what the issue could be?
two comboboxes both with instance name cb is the only cause of that problem that i know about. look to see if one is directly over the 2nd.
if you don't see a 2nd cb, delete everything from the timeline that contains cb, except cb (but don't save that fla) and delete all keyframes except the first that contains cb. click on the only keyframe in the timeline that contains cb and make sure you don't see any (invisible) object highlighted. then test to see if the problem is resolved.
if the problem is not resolved, close the fla (without saving), reload your last saved one and see if anyone else has a plan B. if the problem is resolved you probably have a duplicate cb that you're missing.
I followed all the steps and there's definitely only one instance of "cb", but the problem still remains.
A few other things worth mentioning are, that I am embedding a font in the loaded swf and also the combobox is covered with a mask on movie load, but is transitioned off the combobox on user click. Not sure if that's helpful at all, but I did read somewhere where these two scenarios play havoc on text in a combobox.
Plan B, anyone?
remove the mask and retest. unembed the font and retest. try and narrow the problem's cause yourself. if you can create a simple fla that demonstrates the problem post a link to the fla.