I've just upgraded a WordPress install to 2.8 that uses the WP-Syntax plugin (version 0.9.6).
When navigating to the General Settings page in the admin area, the page display was truncating at the Timezone setting - nothing in the Timezone dropdown and the rest of the settings on that page won't display.
I deactivated all plugins, then reactivated them, one at a time, to see if there was a conflict, and the page displayed correctly until I reactivated the WP Syntax plugin. Then the issue returned.
Also, while on the General Settings page with the plugin activated, the open/close functionality of the admin menu sections does not work. Navigate to another page, and they work again.
For now, I deactivated the plugin, made sure my general settings were correct, then reactivated it so that my blog posts display properly, but would like to see this conflict issue resolved.