The bosh and especially the jingle code is old and unmaintained. It may not work in all cases. Patches welcome.

Smack is split in various subprojects. A typical XMPP over TCP project should use the 'smack-tcp', 'smack-resolver-javax' and 'smack-extensions' subprojects. All other required dependencies are automatically pulled in. This means that such a project should depend only on org.jivesoftware.smack:smack-tcp, org.jivesoftware.smack:smack-resolver-javax and org.jivesoftware.smack:smack-extensions, as all other required dependencies are transitively resolved.

• Renamed Connection to XMPPConnection, which is subclassed by XMPPTCPConnection and XMPPBOSHConnection. You can use find -type f -name "*.java" |xargs sed -i 's;\([^A-Za-z]\)Connection\([^A-Za-z]\);\1XMPPConnection\2;g' to rename Connection to XMPPConnection in your java code.
• Moved provider and packages Classes to their respective package, i.e. org.jivesoftware..(package|provider) find -type f -name "*.java" |xargs sed -i 's;smackx.ServiceDiscoveryManager;smackx.disco.ServiceDiscoveryManager;' find -type f -name "*.java" |xargs sed -i 's;smackx.packet.VCard;smackx.vcardtemp.packet.VCard;'
• The keep-alive mechanism is now provided by PingManager and moved from core to extensions.
• PrivacyList: toString has been reanmed to getName
• You have to call Chat.close() before you drop all references to the Chat instance, or you will be leaking the Chat object until the ChatManager instance is gc'ed.
• ServerTrustManager has been removed, if you want to use XMPP over SSL you may need to provide your own SSLContext to ConnectionConfiguration
• Packet.setProperty() and co where moved out of smack-core into smack-extensions and the API is can now be found under org.jivesoftware.smackx.jiveproperties.
• Connection.getAccountManager() is now AccountManager.getInstance(XMPPConnection)
• All public API methods now return some kind of Collection instead of an Iterator.
• Improved API with regard to Exceptions
• The ToContains Filter was removed. Read me about it here.