ISearch can't handle author parameters - Problems with the new ConfluenceUser Class?

Hi,

We get an error when we do a recently updated search with given usernames(authorsParam). Our code look like this:

RecentUpdateQueryParameters queryParams = new RecentUpdateQueryParameters(
                    authorsParam, labelsParam, spacesParam,
                    getContentTypeFilter(types));
...
ISearch search = searchBuilder.buildRecentUpdateSearch(queryParams,
                startIndex, maxResults);
...

The error we get is:

java.lang.ClassCastException: java.lang.String cannot be cast to com.atlassian.confluence.user.ConfluenceUser

Please see the attached file for the full stacktrace.

The authorParam is a Set of Strings (usernames). The API is trying to convert them to ConfluenceUsers.

Is this a bug?