Looks like Mike's snippet from the SP1 readme file hits the nail on the head.
<snip>
Additional Known Issues
These are problems that have been identified in the original release of Architectural Desktop 2005 that are not corrected with this Service Pack.
Publishing Multiple Sheets Within Project Navigator
When working with a project loaded from a mapped drive, publishing multiple sheets from the Sheets tab of the Project Navigator should be done using the "Publish Sheet Set" button at the bottom of this tab. If you select Publish > Publish Dialog Box... from the right-click menu, a fatal error will occur.
</snip>
I've found that trying the same sheet set publish in the method above eliminates the crash problem. The new problem is that you can't pick page setups for your sheets; the page setups will have to be set as defaults beforehand.
Another method is to type "Publish" at the command line to bring up the Publish Dialog Box. You will have to manually pick your sheet layouts to plot, but it doesn't seem to have a crash problem like it does through the Sheet Set Manager.