We are just syncing all our data to Dropbox and I noticed it is giving me a lot of Sync Issues with incompatible characters.
If I manually check all of the ones it tells me, most of them do not have any special characters in their filename or folders.
Take a look at just this one example:

I cannot see anything wrong with this file path.
ps: also noticed that clicking on "Go to file" in the Dropbox Sync Issues window does nothing.