this plugin used to work but when i upgraded MultiSite Network to 3.1 it broke ... i've turned off EVERY SINGLE plugin and removed all functions.php code and still get FATAL error on line 220 -, ie
Fatal error: Call to undefined function user_row() in /home/user-name/public_html/wp-content/plugins/allow-multiple-accounts/allow-multiple-accounts.php on line 220
i had posted comment on author site earlier in week but does not appear hence posting error status here for others so you don't waste your time ... this plugin failure was also experienced on a second blog network ... and in addition to error code above, i'm unable to add a second user to a shared email no matter what i get error:
Sorry, that email address is already used!
this plugin breaking is unfortunate ... it was really cool when it worked and worked like a charm before ... unfortunately i have a church site that now has to be completely redone because of this broken plugin and no longer can provide "family memberships" with shared email but now have to go back to default WordPress membership of one unique email per member - ugh!
hopefully this info will help others ... cordially, chuck scott