Finally got the update to work, had to do it according to these instructions: http://forum.xda-developers.com/show...47&postcount=6
OS version is now: 5.1.465 (Build 15618.104.22.168), BUT radio is 1.29.00.10 and not 1.38.00.10 as it says on the ROM package. Can someone confirm this? As I had the 1.32 IU Test version installed previously and although I went first back to 1.30 I didn't check what the Radio version was so I don't know if 1.29 radio is something that was left from the 1.32 version or if 1.34 just has the same radio as 1.32.
1.32 was pretty promising version and I hope this one will be even better. I've had no major issues with these newer versions, although just a few days ago the phone ate the battery from 100% to about 15% in two hours when I was in a movie theater and the phone was not supposed to be doing anything!