We have the same issue as reported on the jitsi user mailinglist on Mon Mar 31 13:47:06 CEST 2014 by Mirko Brankovic.
On a transfer the contact shows only the number but not the name for that contact.
The strange thing ist that, if I create the contact without closing jitsi then the name is shown but after closing and reopening jitsi, only the number is shown.
I have tested that on 2.5.5350 and on 2.4-stable on MacOSX and Windows.
Can I create a bug report for that? Or have someone a solution?
A donation for that fix is also possible. Please let me know a price for that and I will try to find out a solution with our customer.
Thank you for creating the best Open Source (not only SIP) SIP Client.
Thanks in advance,