4.1.0RC2 
"array imap_rfc822_parse_adrlist (string address, string default_host)"

The address argument appears to be erroneously passed by reference, and is subsequently mutilated by the function. Hence the following code produces unexpected results. Any subsequent call to imap_rfc822_parse_adrlist() will fail. (This causes major problems with IMP 2.2.6)


$a="aaaaa <a@a.a>";
$b="bbbbb <b@b.b>";
$c=$a;
imap_rfc822_parse_adrlist($a, "troz");
dump("a:$a\nb:$b\nc:$c\n");

output is:
a:aaaaa^@<a@a.a>
b:bbbbb <b@b.b>
c:aaaaa^@<a@a.a>

Note the null character replacing the space between the personal name and mailbox name.