Installation of Wallboard plugin causes SQL exception to be thrown in JIRA logs when using SQL Server

Steps to reproduce

• Setup a JIRA installation with SQL server as the database
• Install the Wallboard plugin (current version is v.1.8.4)

Results

• The wallboard plugin is installed successfully as expected
• The wallboard plugin appears to be functional as expected
• The following errors are thrown in the logs on installing the plugin, and during subsequent JIRA restarts

  2014-05-29 23:41:23,246 localhost-startStop-1 ERROR      [sal.core.upgrade.DefaultPluginUpgradeManager] Upgrade error: Unexpected exception caught during plugin upgrade: com.atlassian.jira.exception.DataAccessException: org.ofbiz.core.entity.GenericDataSourceException: SQL Exception while executing the following:SELECT ID, PORTALPAGE, PORTLET_ID, COLUMN_NUMBER, positionseq, GADGET_XML, COLOR FROM dbo.portletconfiguration WHERE (GADGET_XML =  ? ) (The data types ntext and nvarchar are incompatible in the equal to operator.)
  	at com.atlassian.jira.ofbiz.DefaultOfBizDelegator.findListIteratorByCondition(DefaultOfBizDelegator.java:499)
  	at com.atlassian.jira.ofbiz.WrappingOfBizDelegator.findListIteratorByCondition(WrappingOfBizDelegator.java:336)
  

Workaround
No workaround needed. For the instances on which this upgrade task fails, it actually does nothing. So, if you are unable to launch a dashboard after your recent JIRA upgrade it must be due to an unrelated issue.