Safari irritation

Recently the most important keyboard shortcut in my copy of Safari stopped working; ‘back’ and ‘forward’ are no longer cmd-left arrow and cmd-right arrow, respectively. Instead, checking the ‘History’ menu shows that the default shortcuts are now cmd-[ and cmd-]. I’ll leave my fevered ranting aside to simply ask: how can I change this back to what it should be?

I think it’s a problem I introduced when I re-enabled my audio-transcription macros. Unfortunately, restricting them to Word did not re-enable the arrow-based shortcuts.

I’m using 1.2.3 v125.9. I have not run the software update to 10.3.6 and will wait do so until the lost-data-on-external-hard-drives bug is resolved.