Reloading Inline Comments in FF 3.6 Causes NPE

NullPointerException can be reproduced in Firefox 3.6.7 by doing the following:

1. User A creates a review and adds comments. Assign's User B as the reviewer.
2. User B adds comments to the review.
3. In User A's screen, the notification pop-up comes up in the bottom right corner and the user click's Reload (in Firefox).

The following NPE is generated (full stack trace attached as well as screenshot):

java.lang.NullPointerException
        at com.cenqua.crucible.actions.RetrieveCommentsAjaxAction.generateComments(RetrieveCommentsAjaxAction.java:134)
        at com.cenqua.crucible.actions.RetrieveCommentsAjaxAction.execute(RetrieveCommentsAjaxAction.java:181)

The offending code is as follows:

if (inlineComments == null) {
    inlineComments = new HashSet<InlineComment>();
}
inlineComments.add(inlineComment);
frxsToRetrieve.put(inlineComment.getFrx(), inlineComments);

For some reason inlineComment is set to null.