Error message on Cyrillic RSS Feed

I use Tkabber 0.9.6beta at Linux. I have subscribed some feeds at
rss.jabber.ru. When I recieve Cyrillic feed (for
example. gazeta.ru@rss.jabber.ru), error message is displayed. I tried 0.9.5beta, but message appeared too. Here is the message:

node "?}??|ra???n" does not exist
node "?}??|ra???n" does not exist
    while executing
"Tree::insert .headlines.tree end ?\}??|ra???n ?\}??|ra???n-article-2 -text {     ..."
    ("eval" body line 1)
    invoked from within
"eval [linsert $args 0 Tree::$cmd .headlines.tree]"
    (procedure ".headlines.tree" line 1)
    invoked from within
"$tw insert end $snode $anode -text $desc -open 1  -fill $options(seencolor) -font $font  -data [array get props]"
    (procedure "message::show_headline" line 129)
    invoked from within
"message::show_headline $from $type $subject $body $thread $priority $x"
    ("headline" arm line 2)
    invoked from within
"switch -- $type {
	normal {
	    message::show_dialog $from $type $subject $body $thread $priority $x
	    return
	}
	headline {
	    message::show_he..."
    (procedure "chat::process_message" line 16)
    invoked from within
"chat::process_message  $connid $from $id $type $subject $body $err $thread $priority $x"
    (procedure "client:message" line 25)
    invoked from within
"client:message 1 gazeta.ru@rss.jabber.ru {} headline {     } {} {{} {}} {} {} {{x {xmlns jabber:x:oob} {..."
    ("uplevel" body line 1)
    invoked from within
"uplevel \#0 [list client:message $connid $from $id $type $subject $body $err $thread $priority $x]"
    ("message" arm line 37)
    invoked from within
"switch -- $tag {
	iq {
	    set useid   0
	    set id ""
	    set type [wrapper:getattr $vars type]

	    if {[wrapper:isattr $vars id] == 1} {
		set ..."
    (procedure "::jlib::parse1" line 25)
    invoked from within
"::jlib::parse1 1 {message {from gazeta.ru@rss.jabber.ru to lispnik@jabber.ru type headline} {{x {xmlns jabber:x:oob} {{url {} {} http://www.gazeta.ru/..."
    ("after" script)