[drupal-support] 4.5.x to 4.6.1 upgrade and blocks

[Haisam K. Ido]

I just upgraded from 4.5.x to 4.6.1 and had to manually create the queue
table and alter the watchdog table to add severity.  All seemed well until I
clicked on the blocks section of the admin menu and my left and right
columns disappeared and only the previous center column remained.  This is
now the case with all the themes.  What's going on?