I get this as well. In fact, you don't even need to go up and down directories, just focus the directory selection panel (say, click a normal file, all of which are greyed out) and then click extract and it'll work.
I get this extracting any file that I've tried, multipart rar or no. I'm running up to date Ibex with file-roller 2.24.1. -- Unresponsive extract button with multi-part rar file https://bugs.launchpad.net/bugs/305678 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs