_ParseQuery bug

Hi my 3.6.3 installation started throwing errors after
my last RHEL 5.5 yum update. I’m getting e.g.-

error: Can’t locate object method “_ParseQuery” via package
"RT::Report::Tickets" at
/local/home/server/rt/lib/RT/Report/Tickets.pm line 88.
context:

84: if ( !$queues && $args{‘Query’} ) {
85: my @actions;
86: my $tree;
87: # XXX TODO REFACTOR OUT
88: $self->_ParseQuery( $args{‘Query’}, $tree, @actions );
89: $queues = $tree->GetReferencedQueues;
90: }
91:
92: if ( $queues ) {

code stack: /local/home/mgds/server/rt/lib/RT/Report/Tickets.pm:88
/local/home/mgds/server/rt/share/html/Search/Elements/SelectGroupBy:60
/local/home/mgds/server/rt/share/html/Search/Results.html:88
/local/home/mgds/server/rt/share/html/autohandler:292
raw error

Has anyone seen this and/or knows a fix? Much thanks.
Bob