weird quote bug

Hi

This is really driving me silly - I can't work it out, can anyone see what I'm doing thats stupid and causing this not to match?

This shows that the row exists in the table:

emystery=> select aid,useragent from useragent where useragent like '%ntserver-ps%';
aid | useragent
-----------+---------------------------------------------------------------------------------------------------------
875741007 | Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; file://\\ntserver-ps\publicsw\nt\ie6\ins\active.ins)
(1 row)

this tries to select it (note that I've escaped the backslashes):

emystery=> select * from useragent where useragent ilike 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; file://\\\\ntserver-ps\\publicsw\\nt\\ie6\\ins\\active.ins)';
aid | useragent | date_added | data_browser | data_version | data_os
-----+-----------+------------+--------------+--------------+---------
(0 rows)

no match! This one encodes the backslashes (\xxx octal for ASCII value) in a different way:

emystery=> select * from useragent where useragent ilike 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; file://\134\134ntserver-ps\134publicsw\134nt\134ie6\134ins\134active.ins)';
aid | useragent | date_added | data_browser | data_version | data_os
-----+-----------+------------+--------------+--------------+---------
(0 rows)

again no match! And to show that the above queries were correct:

emystery=> select 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; file://\\\\ntserver-ps\\publicsw\\nt\\ie6\\ins\\active.ins)';
?column?
---------------------------------------------------------------------------------------------------------
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; file://\\ntserver-ps\publicsw\nt\ie6\ins\active.ins)
(1 row)

emystery=> select 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; file://\134\134ntserver-ps\134publicsw\134nt\134ie6\134ins\134active.ins)';
?column?
---------------------------------------------------------------------------------------------------------
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; file://\\ntserver-ps\publicsw\nt\ie6\ins\active.ins)
(1 row)

They are identical! I can't work out whats going on! Please, if anyone can see what's wrong it'll stop me careering into my early grave!

Thanks

Shane