Update: I can reproduce the issue, but it only happens when you have more than one tab open. I'll see what I can do to fix this.

I can't reproduce the issue. On my machine, windows are maximized when I click on the Dock icon of Textastic with that option enabled.

Which OS X version are you using? I'm on 10.8.5.

Also, I'm not aware that I'm doing anything that should prevent the default behavior from working.

I do plan to include a dark keyboard option when I redesign the app for iOS 7.

Please try to enable the "Debug Log" setting in the connection's settings screen. Tap on the blue arrow on the right side of a connection to change its settings. This creates a log file when you try to connect to the server which might help you find out what's wrong.

Password-protected zip files are currently not supported. It's on my todo list though.

They did say this in their answer: "NSOpenPanel does not offer any hooks to open up the iCloud account to navigate any further than one folder deep".

Errm... of course you can create *one level* of folders. The problem is that the open panel doesn't support subfolders. That's a decision Apple made. The underlying technology does in fact support subfolders (you can create subfolders in the Mobile Documents folder in Finder), but that functionality isn't exposed in the open panel.