Connected to an SFTP server, have opened files, saved files, etc. Some operation causes the app to exit with no warning. Doesn't seem to be a pattern yet, but will update this ticked if I notice one.

From console:

6/10/08 8:56:04 AM [0x0-0x59b59b].ch.sudo.cyberduck[136] jobjc_lookupObjCObject(): returning garbage collected java ref for objc object of class ch/cyberduck/core/sftp/SFTPPath 
6/10/08 8:56:04 AM [0x0-0x59b59b].ch.sudo.cyberduck[136] ObjCJava Exit 
6/10/08 8:56:04 AM com.apple.launchd[101] ([0x0-0x59b59b].ch.sudo.cyberduck[136]) Exited with exit code: 255 

• System Version: Mac OS X 10.5.3 (9D34)
• Kernel Version: Darwin 9.3.0
• Boot Volume: Macintosh HD
• Boot Mode: Normal

• Model Name: MacBook Pro
• Model Identifier: MacBookPro4,1
• Processor Name: Intel Core 2 Duo
• Processor Speed: 2.6 GHz
• Number Of Processors: 1
• Total Number Of Cores: 2
• L2 Cache: 6 MB
• Memory: 4 GB
• Bus Speed: 800 MHz
• Boot ROM Version: MBP41.00C1.B03