I have SMF version 1.1.17 (latest in series) and recently updated EZportal to 0.6.6a (from 6.0.1).
(would love to update to 2.xxx, but that's not the issue here)
Anyway after the update to 6.0.6a, the forum shifted to the right of the "center" block, meaning I had 4 columns, with the forum itself squashed into a 3rd narrow column.
The work-around I had to use, was to shift all center blocks to the "top" position, which then allowed the forum to take up the space between the "left" and "right" columns.
I'd prefer to have some block in the 'center" but can't due to this issue.
Have you heard of this happening?
By the way.... EZPortal is great... Thanks for all your hard work!