Upgrading Drupal

Drupal.org shows you 6.22 to start, which is the last version I thought the 6 series had....BUT there is a 6.3 version. Which should I use?

Is it safe to upgrade 6.16 to 6.3?

Thanks!

How can I properly convert my taxonomies from Drupal 6.22 (where my taxonomies were not added directly to the node, but attached because the taxonomy referenced a node type) to Drupal 7.8, so all of the tags is not just thrown into one taxonomyextra field?

I've tried to upgrade from D6 to D7 on several sites, and I'm getting the same problem on all of them: all the formatting/colours break, every time. I've updated all core and contib files and then disabled all contrib modules prior to the upgrades, but every time the upgrade results in nearly unusable formatting and I just can't seem to figure out how to fix it. I've cleared all the caches and disabled all forms of caching, but no luck.

Just wandering once I have seen a Fatal error after installing a module does it mean

1) I can't use the module at all

or

2) Like has happened to me......i disable and enable the module a few times and the error message goes away....Does this make it okay to use or not

cheers

On fjuv.dk I have regular articles with title and body. After upgrading to Drupal 7, the body content is lost. Where should I start debugging?

How can I get the document "5.x themes conversion guide" at http://drupal.org/node/64292?

I get an "access denied" error.