Store Locator error

I’m getting the following error while trying to add a store locations

i have the api code added in administration>addons>store locator

when i then select the buttone to select the co-ords i get the following error:

Fatal error: Cannot use string offset as an array in /homepages/37/d253281580/htdocs/anglershaven/var/compiled/admin/%%E4^E42^E4252AD1%%mainbox.tpl.php on line 53

should this be reported as a bug or have i done something wrong?

It’s a common error that occurs in various parts of admin. It has been discussed but I am not sure whether there is a fix or not.