Cyberduck is a great application for FTP/SFTP/WebDAV use on the Mac which I use daily to manage files on various Linux and Windows servers. It also works rather well together with TextMate, my favourite text editor on Mac (or elsewhere for that matter!) although I lack the ability to open a set of files and get them in one TextMate window.
With the latest version of Cyberduck (3.0.3) I received the message “do you want to report the last crash” every time I started the application. There was no option to remove the alert on future application launches.
To remove the warning when the application is started, just remove the files ~Library/Logs/CrashReporter/Cyberduck*.