AJAX quick reply xml is truncated by 2 bytes

When vBSEO is enabled, AJAX quick reply xml is truncated by 2 bytes; the returned XML is:
<?xml version="1.0" encoding="UTF-8"?>
<postbits>
...</time>
</postbit

When vBSEO addon is disabled, the XML is returned correctly as expected. This results an empty AJAX quick reply encountered an error box. Please advice as to how to correct this problem, Thanks a lot.

Can you please open a ticket with details how to reproduce it (including testing account)? Does it happen here for you?

OK, I have been open a ticket number (Question Ref:2494-WBMS-4081) Thanks Oleg.