What steps will reproduce the problem?

1. Type /bigwigs and go into the Bars options
2. Try to change font via the "Font" dropdown, or bar texure via the "Texture" dropdown
3. Clicking an option in either of the dropdowns doesn't work - nothing happens and the dropdown stays active

What version of BigWigs are you using? (Stating 'latest' is not useful)

v86.1 (2017-12-24)

Do you have an error log of what happened?

No

Any additional information? (example: WoW language if not English) (Attach screenshots here if available, do not link externally)

Do you get any errors?
Install BugGrabber (https://www.wowace.com/projects/bug-grabber) and BugSack (https://www.wowace.com/projects/bugsack) if you don't have them already.

Ok, looks like it was a PlaySound error in LibDDI-1.0 from another addon strangely enough (PVPGrid in my case).

Usually the libs automatically use the newest version of itself to prevent these kinds of errors. For whatever reason, this doesn't happen here. @funkydude will take a look at it.

Yeah, really strange. I've made a ticket on PVPGrid's page too so that they update their LibDDI.