[wp-hackers] wp3.0.1 - admin bug after import category

[Jimmy Roy]

hi all,
I just import all my data from a wp2.7.1 to a fresh installation of
wp3.01.1, everthing is fine except something strange in the category admin,
the child category are not display, but they are imported, when I add a new
post I can see all categories (parent + child), he bug is only in the
category page, any idea ?

another strange behaviour in category page: there are 2 pages but the second
page is empty.

I join some screenshot to explain.

Jimmy