Please clarify:

• Are you addressing the Tails developers?
• Are you referring to announcements of problems in Tails 0.13 which were fixed in Tails 0.14?

Fixing security vulnerabilities is a good thing, in any software. Fixing information leakages is a very good thing in anonymity-promoting software. Open discussion of problems and fixes is a very good thing too.

As a rule, regarding computer security generally, almost all experts agree that the biggest threat comes from failure to keep software patched. For most websurfers, failure to keep browsers, Java, Javascript, flash players patched is especially bad. This is probably true for Tor surfers too.

(For people running web servers, or hidden services, different problems may come to the fore.)

In short, you should probably download the latest iso image, verify the authenticity (using the Tails signing key to verify the signature of the latest iso image), burn the iso image to a DVD, and possibly create a persistent volume on a USB stick, as soon as a new version of Tails becomes available. Continuing to use an old version of Tails could be hazardous.

So you seem to be saying after a short while every release of Tails gewts full of security holes and my anonimity (and my life in some cases) is at risk if I DONT UPGRADE .

No. Virtually all software is "full of security holes" all the time. It's just a list of the known holes which came to light and were plugged during the latest development cycle. Have you read them? They're always mostly obscure and/or irrelevant anyway.

It seems to undermine the very reason Tails exists and worries me a lot

I concur. The phrasing strikes me as a bit melodramatic/counterproductive too.

The phrase " numerous security holes" is ubiquitous in the Debian Security announce mailing list whenever IW/xulrunner are updated. I think everyone should understand this to mean that the Tails developers worked hard to find and fix all the serious vulnerabilities in the previous edition.

It seems almost inevitable that each new edition of anything complicated will have new and unforseen bugs/vulnerabilities. The important thing is that developers find and fix them promptly, and then it is up to the user community to promptly adopt the most recent version.

To avoid a possible confusion: Tails is closely based on Debian unix, whereas Whonix is closely based on Ubuntu unix. Debian employs a system in which the "stable" version is older, but security patches are promptly made available, so for Debian, older versions (if fully patched) are generally more secure. But this model has been challenged in recent years by Firefox adopting a more rapid release cycle; Firefox ESR is too recent an innovation to appear in Debian. For this reason, Debian advises Debian users who use Tor with IW/Firefox to download the latest Tor Browser Bundle (TBB). Using the latest Tails should also be good. In other words, modern browsers are so complicated and so heavily attacked that they deserve to be treated specially, even if this means going outside the invaluable Debian package management system.