Exception thrown from velocity issuesummary.vm portlet

This is thrown when accessing our dashboard:

2005-01-14 14:11:37,004 ERROR [velocity] Left side ($constant.getString("iconurl").startsWith("http://")) of '==' operation h
as null value. If a reference, it may not be in the context. Operation not possible. templates/plugins/jira/portlets/issuesum
mary.vm [line 1, column 61]
2005-01-14 14:11:37,019 WARN [velocity] org.apache.velocity.runtime.exception.ReferenceException: reference : template = temp
lates/plugins/jira/portlets/issuesummary.vm [line 4,column 27] : $constant.getString("iconurl") is not a valid reference.
at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:277)
at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:55)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230)
at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:89)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230)
at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:172)
at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:114)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230)
at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:172)
at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:114)
at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:55)
at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:70)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230)