Could not parse start date error when searching for comments

When using the comment search functionality in Crucible, specifying 'after' and 'before' dates, the search is performed, but an error pops up for a second reporting:

Error
Could not parse start date 2014-01-01T00:00:00

Error 2
Could not parse end date 2014-01-02T23:59:59

As of functionality, the search works, so it seems to be a UI error only. The application logs show nothing.