I wish I had all the small GIFS that used to be the landmark for site building…

In Summary: my upgrade to WordPress 2.7 and 2.7.1 has not gone as well as anticipated:

Thumbnails are not working anymore, making it almost impossible to post images on the blog: a big issue for what is mainly a photo blog.
Based on a small web research, this problem seems to be felt by other users: causes could be GD library, incomplete update etc,.. As I am not an expert at all, this means lots of trying in domain I know nothing about, php etc…
aka
it is going to take some times if WordPress doesn’t come with an updated version solving this issue.

So for now, relax and enjoy what you are doing: I recommend http://www.ted.com/ as a supplement to wisely use your time on the internet. Or flickr for pictures http://www.flickr.com/explore/interesting/7days/?

Aha found: