Some keyboard shortcuts fail to operate intermittently. I’ve occasionally found Quicklook and Cmd+w not functioning. Quicklook often fails with space causing error sound on all files/folders.
Relaunching Totalfinder (by restarting Finder, then re-running Totalfinder) sometimes helps, but not always. For example, Cmd+w is still not working currently after Totalfinder restart.
Totalfinder 1.5.26 on OS X 10.9.2