advcache_nodeapi never expires nodes cached for anonymous users

advcache_array2int returns 0.5 for anonymous users, because pow(2, -1) returns 0.5. i'm running php 4.3.9. perhaps this behavior is different in php5?

anyway i've got cids like "100::0.5" in the cache_node table.

advcache_nodeapi only expires cache entries with integer suffixes (for ($i = 1; $i < $maxrole; $i++), so the anonymous nodes are never expired.

the least elegant way i could find to fix this was to expire anonymous nodes with an extra line in advcache_nodeapi

cache_clear_all($node->nid. '::0.5', 'cache_node');