Having just found a work around for a bug we found in the 2.8 version that resulted in lost ability to publish posts (see below)--which was like finding a needle in a haystack, now we can edit but are stuck in html mode--like everyone above.
Disabling plugins, clearing cache, switching browsers, renaming the plugin directory... these are superficial fixes. Clearly there are many more bugs than the one that we found throughout the 2.8 branch. Is there any effort underway to address the fundamental problems that are plaguing all of these 2.8 blogs?
Option for 2 column screen not present in add/edit page, thus, publish box, set to column 2 dissapears.
FIX :
in FILE : wp-admin/edit-form-advanced.php
LINE 268
add_meta_box('submitdiv', __('Publish'), 'post_submit_meta_box', 'post', 'side', 'core');
becomes
add_meta_box('submitdiv', __('Publish'), 'post_submit_meta_box', 'post', 'normal', 'core');