after upgrading from 1.1 to 1.4 (which worked fine) I activated the anoymizeIP Plugin.
But still can see the full ip-adress in the visitor-trace-log.
The last number is not 0.
ip_address_mask_length = 1
is set in the global.ini.php
PluginsInstalled = "AnonymizeIP"
is set in the config.ini.php