Thank you very much for these reports. I wish more people would report bugs!
Thank you for doing such awesome work and keeping everything compatible even with 10.4!
I've already found the cause of #1 (the "Copy to Clipboard$" problem) and will fix it in time for the next release. (It only shows up on OS X 10.5 and lower.)
#2 and #3 will take me more time, too -- I'll have to dust off my 10.5 machine.
I'll test it on my Snow Leopard machine also the next time I get to it.
By #4, "log view in VPN Details is not perfectly positioned", do you mean the top left corner should be higher up and to the left? Good catch! Again, that will be fixed in the next release.
I'll look into #5. I haven't been aware of anything that messes with /usr, so I never compiled a list of what ownership/permissions it should have on various versions of OS X. When I've done that I will either add that to the discussion (which is at https://groups.google.com/d/msg/tunnelblick-discuss/jZnYOL8zIN8/l4ozoQMZN4MJ) or maybe add a Tunnelblick wiki page about the permissions on system folders. I don't even know how to find out the ownership/permissions on "/", though, so I probably won't mess with that. The problem with this whole topic is that the OS X 10.4 and 10.5 Disk Utility doesn't fix ownership/permission on some -- maybe most? -- system files. So I can't know for sure what the correct permissions should be without making a clean install, which is a lot of work.
To find out the ownership/permissions on "/" I just did "ls -al / | head -n 2 | tail -n 1", but I have absolutely no idea if that's the correct way of doing it.
The thing with Disk Utility is that afaik it just goes through the install recipes and changes the permissions for the files it has a recipe for.
Maybe they have changed that with Snow Leopard or they added a recipe for all the system folders.