Dropbox: /delta and shared folders

Question

I'm using the /delta feature to find whether anything has changed in the Dropbox account.

When I run it for the first time (till 'has_more' becomes False), it's fine. But when I run it again (with the cursor from the previous call), it shows a list of files. I run it again (without changing any file), and I still get the same list of files (although they hadn't changed). I figured that these files were in a shared folder. I tested again with a new set of files in that folder and I get the same result -- these files show up in the delta entries although they weren't changed.

What's wrong?

I feel this is a bug. Any way to get around it?

Edit: Here's the code

def getDeltaEntries(self): #this function is a method of a class
    def _getDelta():
        delta = self.client.delta(self.cursor)
        entries = delta.get('entries')
        has_more = delta.get('has_more')
        self.cursor = delta['cursor']

        while has_more:
            delt = self.client.delta(self.cursor)
            entries.extend(delta.get('entries'))
            has_more = delt.get('has_more')
            self.cursor = delta['cursor']
        return entries
    #workaround: query for delta twice and if the result is the same both times, 
    #it implies there's no change

    ent1 = _getDelta()
    ent2 = _getDelta()
    if ent1 == ent2:
        entries = []
    else:
        entries = ent1
    return entries

Answer 1

It looks like your code is using self.cursor = delta['cursor'] when it should be using self.cursor = delt['cursor'].