In the 'printable' issue navigator view, I get repeated exceptions in the log:

2005-04-27 17:56:13,029 ERROR [velocity] Left side ($firstsort.field) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. templates/jira/issue/table/issuetable.vm [line 15, column 41]
2005-04-27 17:56:17,728 ERROR [velocity] Left side ($firstsort.field) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. templates/jira/issue/table/issuetable.vm [line 15, column 41]
2005-04-27 17:56:17,728 ERROR [velocity] Left side ($firstsort.field) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. templates/jira/issue/table/issuetable.vm [line 15, column 41]
2005-04-27 17:56:17,728 ERROR [velocity] Left side ($firstsort.field) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. templates/jira/issue/table/issuetable.vm [line 15, column 41]
2005-04-27 17:56:17,728 ERROR [velocity] Left side ($firstsort.field) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. templates/jira/issue/table/issuetable.vm [line 15, column 41]
2005-04-27 17:56:17,728 ERROR [velocity] Left side ($firstsort.field) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. templates/jira/issue/table/issuetable.vm [line 15, column 41]
2005-04-27 17:56:17,728 ERROR [velocity] Left side ($firstsort.field) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. templates/jira/issue/table/issuetable.vm [line 15, column 41]