JOEMIT  Yep, GLIMS was the culprit, once I removed it from Applcation Support it ran fine. Looks good.  
(Version 4.0b1)

JOEMIT  Will not open on 2.4GHz Core 2 Duo MacBook Pro running 10.5.6, everything up to date, doesn't event try to run. Thank goodness there was an uninstaller. Not a great start for a beta!  
(Version 4.0b1)

JOEMIT  Okay, I've given up trying to get this to work.

It worked briefly after I had installed the latest SE upgrade and having double checked that everything else was up to date. Now it's back to reporting an error and will not connect.

I see that Sony Ericsson has pulled the plugin from the web site with no explanation, just a blank space on the page where the download used to be.  
(Version 1.07)

JOEMIT  At last!!! I've been waiting for this ever since I got my P990i. Means I wont have to load XP via Parallels just to sync my phone.

Unfortunately I can only sync Calendars. When I try to sync Contacts I get the error message;

"[P990i] Connection to the phone failed.

Please make sure that your phone is turned on. If this error occurs again, please restart your phone.

Device "P990i" synchronization failed"

I have tried deleting and re-pairing the Mac to the phone, restarted the phone and I've checked that all software and the phone are up to date. The only other thing I can think of trying is to do a Master Reset on the phone but since it's a bit of a time consuming process to re-install all my third party applications I'll put this off until I learn if there is a quick fix.

Thanks to Sony Ericcson for making this available, it will make my phone much more usable once it's working correctly.  
(Version 1.07)

JOEMIT  Installed on MBP running 10.4.9, all software up to date. Immediately quits when opened. Re-built permissions, etc, no effect. Uninstalled, re-installed, same problem. Reverted to v2.0.4.

Joe  
(Version 3.0b)

JOEMIT  Installed Beta 3.0 on MBP running 10.4.9, all software up to date. Quits immediately on launch. Re-built permissions, etc. Still quits immediately. Uninstalled and reverted to Safari 2.0.4.  
(Version 3.0b)