Can't select contact records from custom search profile when sorted by Current Employer

When a Search Views profile includes the Current Employer field AND you sort on that field, the Prev/Next cache is not populated. This causes the function which handles row selection (CRM_Core_BAO_PrevNextCache::getSelection) to fail.

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This is a recurrence of this bug from last year:
https://issues.civicrm.org/jira/browse/CRM-12840

I tested it on drupal.demo.civicrm.org which is on 4.4.5
To replicate it do the following
1) create a custom search profile with at least one field other than name
2) use advanced search and display the results using the custom search profile.
3)Sort the search results by one of the fields in the custom search profile.
4) try to select individual records. The counter will stay at 0 and the records will not show as having been selected.