Checked my code and would you believe it I’d omitted the authentication on suggestions & available, only spotted it when I went looking for parameters so thanks for that, they now work.
As for the comma encoding I’m using the following code to get the comma separated list of usernames…
int index;
NSString *screenNames = [[savedACUsersList objectAtIndex:0] valueForKey:@"username"];
for (index = 1; index < savedACUsersList.count; index++)
{
NSString *screenName = [[savedACUsersList objectAtIndex:index] valueForKey:@"username"];
screenNames = [screenNames stringByAppendingFormat:@",%@",screenName];
}</code>
It works with 1.0 but not 1.1 and I’m definitely authenticating this time.