Colin, #17 and #22 imply that default shortcuts also did not work, at least at some point. Since no one here seems to know exactly where this bug is occurring, and since it seems to be random (and therefore perhpas a race condition), it's not much of a stretch to assume that the same bug manifests slightly differently for different people. Whether a keybinding is default or customized seems unlikely to me to make much of a difference wherever these system-wide keybindings are implemented in code.
Colin, #17 and #22 imply that default shortcuts also did not work, at least at some point. Since no one here seems to know exactly where this bug is occurring, and since it seems to be random (and therefore perhpas a race condition), it's not much of a stretch to assume that the same bug manifests slightly differently for different people. Whether a keybinding is default or customized seems unlikely to me to make much of a difference wherever these system-wide keybindings are implemented in code.