The mercurial backend does not pass the --quiet option to hg, and it sometimes prints
messages which are then taken for CGI output, causing errors and general trouble. --Michał

    --- iki/usr/share/perl5/IkiWiki/Rcs/mercurial.pm	2006-12-29 02:48:30.000000000 +0100
    +++ /usr/share/perl5/IkiWiki/Rcs/mercurial.pm	2007-03-18 22:45:24.000000000 +0100
    @@ -55,7 +55,7 @@
     }
 
     sub rcs_update () { #{{{
    -	my @cmdline = ("hg", "-R", "$config{srcdir}", "update");
    +	my @cmdline = ("hg", "-q", "-R", "$config{srcdir}", "update");
     	if (system(@cmdline) != 0) {
     		warn "'@cmdline' failed: $!";
     	}
    @@ -80,7 +80,7 @@
     
     	$message = possibly_foolish_untaint($message);
     
    -	my @cmdline = ("hg", "-R", "$config{srcdir}", "commit", 
    +	my @cmdline = ("hg", "-q", "-R", "$config{srcdir}", "commit", 
     	               "-m", "$message", "-u", "$user");
     	if (system(@cmdline) != 0) {
     		warn "'@cmdline' failed: $!";
    @@ -92,7 +92,7 @@
     sub rcs_add ($) { # {{{
     	my ($file) = @_;
     
    -	my @cmdline = ("hg", "-R", "$config{srcdir}", "add", "$file");
    +	my @cmdline = ("hg", "-q", "-R", "$config{srcdir}", "add", "$file");
     	if (system(@cmdline) != 0) {
     		warn "'@cmdline' failed: $!";
     	}

Thanks much for the patch. [[bugs/done]] --[[Joey]]