When a user tries to save a text which has "&" in it, Spark will disconnect from the server and not save this text.

Exception:
Mar 02, 2016 9:39:26 PM org.jivesoftware.spark.util.log.Log error
SEVERE:
No response from the server.:
at org.jivesoftware.smackx.PrivateDataManager.setPrivateData(PrivateDataManager.java:255)
at org.jivesoftware.sparkimpl.plugin.scratchpad.PrivateNotes.savePrivateNotes(PrivateNotes.java:128)
at org.jivesoftware.sparkimpl.plugin.scratchpad.ScratchPadPlugin$16.actionPerformed(ScratchPadPlugin.java:510)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at org.pushingpixels.substance.internal.utils.RolloverButtonListener.mouseReleased(RolloverButtonListener.java:124)
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$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
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)

Another user reports he can't open his notes and Spark disconnects when he tries to do this. Similar exception is logged:

Μαρ 02, 2016 1:08:31 ΜΜ org.jivesoftware.spark.util.log.Log error

SEVERE:
No response from the server.:
at org.jivesoftware.smackx.PrivateDataManager.getPrivateData(PrivateDataManager.ja va:209)
at org.jivesoftware.sparkimpl.plugin.scratchpad.PrivateNotes.getPrivateNotes(Priva teNotes.java:143)
at org.jivesoftware.sparkimpl.plugin.scratchpad.ScratchPadPlugin$14.construct(Scra tchPadPlugin.java:430)
at org.jivesoftware.spark.util.SwingWorker$2.run(SwingWorker.java:141)
at java.lang.Thread.run(Unknown Source)

Could be a server's issue (server refusing to accept this text into a private storage).