When a user logs work, following lines are appended to the Tomcat log files. Should I worry?

Kind Regards,
Tom Moors

2011-01-26 16:42:00,515 ajp-8009-6 WARN weynde 1002x7688x1 1orcyj9 10.18.15.121 /secure/CreateWorklog!default.jspa [atlassian.plugin.webresource.DefaultResourceDependencyResolver] Cannot find web resource module for: jira.webresources:yui
2011-01-26 16:42:00,515 ajp-8009-6 WARN weynde 1002x7688x1 1orcyj9 10.18.15.121 /secure/CreateWorklog!default.jspa [atlassian.plugin.webresource.DefaultResourceDependencyResolver] Cannot find web resource module for: jira.webresources:yui-autocomplete
2011-01-26 16:42:00,515 ajp-8009-6 WARN weynde 1002x7688x1 1orcyj9 10.18.15.121 /secure/CreateWorklog!default.jspa [velocity] Could not determine type of iterator in #foreach loop at [0,0] in template secure/views/issue/logwork-4.2.x-x.vm
2011-01-26 16:42:00,515 ajp-8009-6 ERROR weynde 1002x7688x1 1orcyj9 10.18.15.121 /secure/CreateWorklog!default.jspa [velocity] Left side ($selectedCommentLevel) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. secure/views/issue/logwork-4.2.x-x.vm [line 5, column 42]
2011-01-26 16:42:00,515 ajp-8009-6 ERROR weynde 1002x7688x1 1orcyj9 10.18.15.121 /secure/CreateWorklog!default.jspa [velocity] Left side ($selectedCommentLevel) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. secure/views/issue/logwork-4.2.x-x.vm [line 5, column 42]
2011-01-26 16:42:00,515 ajp-8009-6 ERROR weynde 1002x7688x1 1orcyj9 10.18.15.121 /secure/CreateWorklog!default.jspa [velocity] Left side ($selectedCommentLevel) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. secure/views/issue/logwork-4.2.x-x.vm [line 5, column 42]
2011-01-26 16:42:00,515 ajp-8009-6 ERROR weynde 1002x7688x1 1orcyj9 10.18.15.121 /secure/CreateWorklog!default.jspa [velocity] Left side ($selectedCommentLevel) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. secure/views/issue/logwork-4.2.x-x.vm [line 30, column 87]
2011-01-26 16:42:00,515 ajp-8009-6 ERROR weynde 1002x7688x1 1orcyj9 10.18.15.121 /secure/CreateWorklog!default.jspa [velocity] Left side ($selectedCommentLevel) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. secure/views/issue/logwork-4.2.x-x.vm [line 30, column 87]
2011-01-26 16:42:00,515 ajp-8009-6 ERROR weynde 1002x7688x1 1orcyj9 10.18.15.121 /secure/CreateWorklog!default.jspa [velocity] Left side ($selectedCommentLevel) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. secure/views/issue/logwork-4.2.x-x.vm [line 30, column 87]