MarketPress Store Setup

Create new user account with blog/site.

Go to admin and then store configuration to setup store.

Go to select currency and get:
Warning: array_merge() [function.array-merge]: Argument #1 is not an array in /home/xxx/public_html/wp-content/plugins/marketpress.php on line 3042

Try a second time as has not selected and get:
Fatal error: Cannot use string offset as an array in /home/xxx/public_html/wp-content/plugins/marketpress.php on line 330

From this time nothing works for this subdomain - admin or frontend - just gives above fatal error message.

Site under dev at - just trying to get things setup now and don't seem to be getting far.

Site is running wpmu, buddypress and bbPress - installed by (2 days ago) - using Studio theme.