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-rw-r--r--plugins/kolab_addressbook/lib/rcube_kolab_contacts.php3
1 files changed, 3 insertions, 0 deletions
diff --git a/plugins/kolab_addressbook/lib/rcube_kolab_contacts.php b/plugins/kolab_addressbook/lib/rcube_kolab_contacts.php
index a01ff52..c251d1e 100644
--- a/plugins/kolab_addressbook/lib/rcube_kolab_contacts.php
+++ b/plugins/kolab_addressbook/lib/rcube_kolab_contacts.php
@@ -1043,6 +1043,9 @@ class rcube_kolab_contacts extends rcube_addressbook
$a_value .= is_array($a['email']) ? $a['email'][0] : $a['email'];
$b_value .= is_array($b['email']) ? $b['email'][0] : $b['email'];
+ $a_value = mb_strtolower($a_value);
+ $b_value = mb_strtolower($b_value);
+
// return strcasecmp($a_value, $b_value);
// make sorting unicode-safe and locale-dependent
if ($a_value == $b_value)