While checking the Informix URL List for dead links, I discovered a valuable URL from Informix Tech Support that provides helpful information as well as tips and tricks around Informix:

• Informix Problem Resolution (Tech Notes)

If you are new to Informix, check this URL as it contains a lot of small and handy tips around Informix that are updated frequently.

Unfortunately it seems that those tech notes are not delivered as a RSS feed or at least I couldn't find it. If somebody knows if such a RSS feed is provided by IBM Support, please let me know, so I could add the feed to Informix Zone as well as planetIDS. Thank you !