This Ajax webmail solution rocks!!

I only get one error when loading a specific e-mail with a rather large (1.4mb)attachement (others work with attachement without error).

DB Error in /usr/local/apache/htdocs/roundcubemail/program/include/rcube_db.inc (148): DB Error: unknown error; QUERY: INSERT INTO cache (created, user_id, session_id, cache_key, data) VALUES (now(), ?, ?, ?, ?)

Does anybody know why?

THX Philippe