Hello,
have similiar issue.

StackTrace :

java.lang.IllegalStateException: Dialect (PostgreSQL) doesn't provide a java type for native type = uuid
at net.sourceforge.squirrel_sql.fw.dialects.CommonHibernateDialect.getJavaTypeForNativeType(CommonHibernateDialect.java:595)
at net.sourceforge.squirrel_sql.fw.dialects.PostgreSQLDialectExt.getJavaTypeForNativeType(PostgreSQLDialectExt.java:1282)
at net.sourceforge.squirrel_sql.fw.dialects.CommonHibernateDialect.getTypeName(CommonHibernateDialect.java:581)
at net.sourceforge.squirrel_sql.fw.dialects.DialectUtils.getCreateTableSQL(DialectUtils.java:1823)
at net.sourceforge.squirrel_sql.fw.dialects.CommonHibernateDialect.getCreateTableSQL(CommonHibernateDialect.java:299)
at net.sourceforge.squirrel_sql.plugins.dbdiff.gui.AbstractSideBySideDiffPresentation.execute(AbstractSideBySideDiffPresentation.java:102)
at net.sourceforge.squirrel_sql.plugins.dbdiff.commands.CompareCommand.execute(CompareCommand.java:62)
at net.sourceforge.squirrel_sql.plugins.dbdiff.actions.CompareAction.actionPerformed(CompareAction.java:121)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.AbstractButton.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$400(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at net.sourceforge.squirrel_sql.client.Main$1.dispatchEvent(Main.java:99)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)