Post is not broke, confirmed.
@scottlink
I don't think it's the app. J has anything resembling regex blocked on the backend. You'll run into this with links to certain sites, for example when the URL has [ / ] followed by [ ? ]. YouTube and a few other sites with this formatting are whitelisted in his filters.
Add [ nosanitize ] somewhere in your post which deactivates some (all?) of the filtering.
Weird. I had /priv in the original version of Day91 post, wonder if that created a problem. I reworded to eliminate the forward slash and was able to post.