I don't know if this this is happening for anyone else, but when I use the hyperlink tool from the toolbar (the button that looks like two links of chain) it never seems to properly post the hyperlink.
If you want to post a working link, you can copy and paste the sample code below and replace the web address with your link and your own description.
Replace http://www.example.com with your hyperlink and be sure to leave the = and the first >. Your hyperlink must be formatted correctly, starting with http://
It is usually best to open the page in a browser and copy and paste the address straight from the address bar. Replace the word Example (be sure to leave the > < symbols on both sides) with whatever you want the text of the link to say. This can either be a repeat of the hyperlink address, or different words that you you can click to take you to the link.