ago myself which is why I came to Forum Feedback to see if anyone else was have an issue. There was a brief period of time a little while ago when the forums totally disappeared and when they reappeared is when I noticed the problem. There were links in the the forum that worked fine earlier and now I have to do just as you explained Grif.Strange for sure. I tried posting a link to a news article a few minutes ago and regardless of what I did, it was posting with that space in it so I did not post the article. Short links work fine.
Within the response itself, if a link is posted, it frequently is broken and text within the link is separated so the link doesn't work. It appears to be happening when the link is long. Below are a couple of links to threads where I see the problem. In fact, if I'm right, the links below won't work either. You'll need to copy the text to a browser address bar, then eliminate unnecessary spaces in the text of the link:
I just noticed it today and it happens in both Internet Explorer and Firefox browsers. It looks like a forum software issue.