Permalink in calendar displays as /%yea

I’ve recently transferred my blog to a new server. Everything seems to be in order…the permalinks work fine for posts and categories. But, for some reason, the links in the calendar display only as “/blog/%yea”, resulting in a bad request error. My permalink structure is “/%year%/%monthnum%/%postname%/” and I’ve double-checked that the htaccess file represents the correct code. Any ideas why I’m now having this problem?