This is caused by a small bug in the statistics module's browser detection code. Note that this browser detection logic is very weak and really should be replaced... but here's a fix in the meantime:
Change line 194 of SolrStats.php to:
'browserVersion' => isset($product) ? $product : '',
That should solve the problem.
From: Asier Etxeondo [mailto:vendoycompro2011@...]
Sent: Wednesday, February 29, 2012 11:21 AM
Subject: [VuFind-General] Error in SolrStats.php
I have seen this error messsage in my error.log file:
PHP Notice: Undefined offset: 1 in /usr/local/vufind/web/sys/SolrStats.php on line 194, referer: http://srvvufind/Record/234722
I have been testing Vufind with Google Chrome, Mozilla Firefox and Internet Explorer.
When I use IE as browser I have this error. Do you have this problem too?