[Plugin: Stray Random Quotes] Translation not loaded

I have a Danish translation – stray-quotes-da_DK.mo – that is not loading. The suffix da_DK is the correct one to use; it works ok with other plugins. (The poedit template that I used for the localization works with other localizations.)

I have tried to rename the mo file to da_DK.mo, but it did not help.

I have checked both on a blog running on a subdomain and one running on the main domain.

Any suggestions?