Issue Navigator has problems when Multi Select Searcher is used for Select List custom fields

If you use the Multi Select Searcher for select lists the search is not completed. One error that occurs is:
2005-07-28 17:18:50,119 WARN [velocity] Could not determine type of iterator in #foreach loop at [0,0] in template templates/plugins/fields/view-searcher/view-searcher-multioption.vm

From a support email:
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We have been working w/ Filters and noticed that listbox selections in the "Custom Fields" section in the filter sidebar are not maintained during the View or Edit processes. This affects our "How Found", "QA Status" and "Severity" listboxes but not the dropdown boxes, radio button selections or text fields in this section. It also does not affect the listboxes in the "Issue Attributes" section ("Issue Type", "Status", "Matching Priorities", etc.)

Whenever we try to Edit a query that includes "How Found" values, the "How Found" values are erased in the filter display

To Reproduce
1. Create new filter for FSM project
2. Select several values in the "How Found" Custom Fields box (ie, Test Case, Regression Test) - can also try this with "QA Status" or "Severity"
3. Click "View" button & review results. Save filter.
4. Click "Edit" link for that filter
5. Scroll down to the "How Found" list - note that all values have been deselected.
6. Clicking "Edit" should load the entire filter and all its settings.

Whenever we create a query with "Custom Fields" listbox values and click "View", the listbox values are deselected.

To Reproduce
1. Create new filter for "All Projects"
2. Select several values in the "Severity" and "QA Status" fields
3. Click "View"
4. Look at the filter sidebar and scroll down to the "Custom Fields" section - the "Severity" and "QA Status" selections are no longer highlighted.