Hello

I am using the voucher feature of the captive portal to allow players to 
connect to the Internet on a lanparty for a given time.
When somebody enters the voucher code on the captive portal site an 
error message is shown:

Warning: base64_encode() expects parameter 1 to be string, array given 
in /etc/inc/voucher.inc on line 152
Warning: Cannot modify header information - headers already sent by 
(outout started at /etc/inc/voucher.inc:152) in 
/usr/local/captiveportal/index.php on line 447

I have tried generic pc 1.3b3 and 1.3b4, same error with both versions.
When I then hit F5 to reload the site the code is accepted and I can 
access the internet. After the given time I am disconnected from the 
Internet, but I can use the same code to log in AGAIN.

I hope somebody can look at this.

Greetings
Carsten Hholbach