I'm having a similar problem. When I use Z4 to root is says rebooting phone but I get stuck on the clockworkmod screen! Is there anyway of getting around this?
You know you guys got me so intrigued I decided to sbf to the system only 2.2.340 and gain root again with Z4. wish me luck!
Ok I've flashed and formatted my data so starting from scratch again.
I installed Oynmous app installer and used that to install the Z4 1.3 app from SD.
First go at it asked me to Debug. So my bad, I guess you do have to debug.
Secound go I Permanently rooted it winked at me and nothing, no superuser, nothing.
Third go at it it rebooted and Superuser is now there, I'm thinking I'm rooted.
downloaded Root Explorer (you need root for that) Opened it. Superuser asks for permission I say yes da da da da...I HAVE ROOT.
As sbf s go you need to know what system version your in before flashing sbf. there's like 4 different ones now flying all around here so be careful.