ANDREAS J. MUHR  I have the same problem. LCC 3.1 screws up the display of my Safari Tabs. Sometimes even makes the Safari menu bar entries disappear.   
(Version 3.1)

ANDREAS J. MUHR  By default, Apple Address Book exports multiple contacts to a single file (if you drag and drop the contacts). However, by holding the option key while dragging and dropping, individual VCF files for the contacts will be created.  
(Version 1.1)

ANDREAS J. MUHR  "Device not found" -- I own the S 530 combo for Mac  
(Version 2.1.2)

ANDREAS J. MUHR  Interestingly enough, the erratic behaviours I mentioned went away with the latest Mac OS X Update, 10.4.8.

I still maintain however my criticism of user interface and settings migration.  
(Version 2.1.1)

ANDREAS J. MUHR  Keeps getting worse and worse... Very bug-ridden behaviour on my PB on 10.4.7 with their S530 Combo. It forgets settings or fails to perform certain button actions e.g. after logout/fast user switching or if I didn't boot with the hardware attached (I have to reboot in order to restore full functionality), and why doesn't it migrate previous versions' settings? After each updates I have to reconfigure my settings. Also the Logitech Center isn't very user-friendly in its design (non-obvious interaction required etc.).

Unfortunately, as a combo user I can't use any other software with the mouse and keyboard (that I really like otherwise).

Logitech, work over the driver from scratch. Please.  
(Version 2.1)

ANDREAS J. MUHR  Almost two months ago, I stopped trying one "RSS" (feed) reader after the other (Vienna, Netnewswire,...), never being completely happy, and settled with NewsFire, which complements my way of reading and working perfectly. I have found no other feed reader that I would recommend more!

+ excellent functionality, smart features

+ stunning looks

- no support section on homepage, no manual. BUT: NewsFire is very straight-forward, mac-like and intuitive, so I personally have never needed any help. Also, the author is reported by posters below to be quick responding to personal questions via e-mail.

I love it. Definitely worth the purchase.  
(Version 1.3v59)