Database error after installing 2.1

Hi, i’ve just installed wordpress 2.1 and after installation i now get this error in my catagories part of the write post page:

WordPress database error: [Unknown column ‘link_count’ in ‘where clause’]
SELECT cat_ID FROM wp_categories WHERE category_parent = 0 AND ( link_count = 0 OR category_count != 0 OR ( link_count = 0 AND category_count = 0 ) ) ORDER BY category_count DESC

It also apears in my catagory list on my index and the following appears on the blogroll tab:

WordPress database error: [Table ‘community.wp_link2cat’ doesn’t exist]
SELECT category_id FROM wp_link2cat WHERE link_id = 31 ORDER BY category_id

Anyone got any ideas on what the problem could be?

Thanks

Myles