Michel,
Not sure if someone already brought this forward, but if you are searching for messages, it looks as if the "To:" option is ignored, for example I am trying to search for a message that someone replied to me some time ago, so in the "To:" I put my id (027526), but I get a list of messages that not only were not replies to me, but from threads I've not even participated.
"The five senses obstruct or deform the apprehension of reality."
Jorge L. Borges?
"Premature optimization is the root of all evil in programming."
Donald Knuth, repeating C. A. R. Hoare
"To die for a religion is easier than to live it absolutely"
Jorge L. Borges