Ever since Dropbox has moved to the sci/fi format for generating links, I've been running into a constant issue of the url links becoming so ridiculously long that websites with linkfilters will destroy the address, rendering them unusable.
I used to be able to scrape by with finding ways to generate the old, far shorter links, but it's not possible anymore and it's looking more and more likely that I may need to change away from Dropbox due to this issue.