Wrong contact displayed for some messeages

[GoogleCodeExporter]

What steps will reproduce the problem?
1.only open inbox  

What is the expected output? What do you see instead?
the correct sender

What version of the product are you using? On what operating system?
v1 rc2 on 1.1.4

Please provide any additional information below.
the displayed contact has the same num as the actual sender with only one 
different digit. they 
have the following format:
actual sender: +966555######
displayed contact: +966505######
where ###### is the same in both numbers

Original issue reported on code.google.com by kahok...@gmail.com on 13 Mar 2008 at 4:54