[support] Nodes do not show in normal view (I can still edit them and summary shows)

all my nodes are gone, the main text (the book pages, forum articles etc., everything).

everything else seems OK, all modules seems to be working, I can even edit the nodes (so they are not lost), they show in summary mode (e.g. on front page).

it's kinda weird, just look at frontpage and click on any item and see it's not shown: http://zasran.com/ (example of node: http://zasran.com/drupal/?q=node/16)

not sure how this happened, it was working before, the only related change was a drupal security update (not sure what that did, I used debian package).

any ideas?

my system:

debian unstable drupal 4.5.8-1.1 (that's the latest in debian)

(I know I should upgrade but I was hoping debian package will be updated...)

erik