I installed 3.0.4 + 1.4.5 and tried 1.5 RC3 today.
A problem in GF results in the default WP media buttons to disappear ( upload image, upload video etc.. ) above the normal editor. ( new/edit page/post ).
In addition, the GF insert form button is also not showing.
I enabled WP DEBUG in wp-config and this is what came up:
gravityforms.php on line 364 Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead. in /home/snip/wp-includes/functions.php on line 3321
I deactivated GF and the media buttons were back again.