Core forum user interface issue

Categories field is collapsed by default when creating new forum topics.

In Drupal core forum (when there is more than one vocabulary assigned to the forum content type) creating a new forum topic causes the categories field to appear collapsed by default.

See attached pics.

This is not very user friendly - especially since category is a required element. Typically the user will miss the field altogether and submit a forum post only to receive a red box warning - somewhat ironically around the now visible category field.

I've found no way to fix this. I hope we can avoid this situation in Drupal 7

G