Doesn't work with translated permissions

I found out that when I changed permissions and wanted to save them, they didn't get saved. So I started disabling other modules and I discovered that disabling the "Locale" module fixed the problem.
Further exploring revealed that permissions that didn't have a translation (e.g. "view date repeats" in the date module) DID get saved. Permissions that had a translation (e.g. the core modules) were NOT saved. Even when a single module has translations for some of it's permissions and no translations for others, only the ones that are untranslated are saved.

I'm using the Dutch language pack btw, if it's relevant.