increment/decrement with non-existent keys and a default value cause a key's flags to be reset, making PHP type detection hard.

According to http://code.google.com/p/memcached/wiki/BinaryProtocolRevamped#Increment,_Decrement an arithmetic operation on a non-existent key cause flags to be reset. The php extension requires flags to determine the php type of the stored value. that info gets lost.

This demonstrates the issue:

couchbase_increment($handle, "key", $offset = 1, $create = true, $initial_value = 2);
couchbase_get($handle, "key");

this currently results in

PHP Warning: couchbase_get(): unknown payload type in %s
PHP Warning: couchbase_get(): Faild to get a value from server: Generic error in %s

the expected result is

that couchbase_get() returns 3.