Recently, Steam's often shown me that there are updates for workshop items, but it doesn't actually seem to update anything: the Steam client keeps telling me that 0 bytes out of 0 bytes have been downloaded. In other words, I don't even know if there is anything that should be downloaded.

Any tips on how I can solve this? I've found plenty of posts and pages online that seem to have the same problem, but I've yet to find a solution that works.