diff --git a/src/libguac/user-handshake.c b/src/libguac/user-handshake.c
index a9cf003b..e9ccbacd 100644
--- a/src/libguac/user-handshake.c
+++ b/src/libguac/user-handshake.c
@@ -199,7 +199,7 @@ int __guac_handshake_size_handler(guac_user* user, int argc, char** argv) {
 }
 
 int __guac_handshake_audio_handler(guac_user* user, int argc, char** argv) {
-    
+
     /* Store audio mimetypes */
     user->info.audio_mimetypes = (const char**) guac_copy_mimetypes(argv, argc);
     
@@ -208,7 +208,7 @@ int __guac_handshake_audio_handler(guac_user* user, int argc, char** argv) {
 }
 
 int __guac_handshake_video_handler(guac_user* user, int argc, char** argv) {
-    
+
     /* Store video mimetypes */
     user->info.video_mimetypes = (const char**) guac_copy_mimetypes(argv, argc);
     
@@ -227,6 +227,9 @@ int __guac_handshake_image_handler(guac_user* user, int argc, char** argv) {
 
 int __guac_handshake_timezone_handler(guac_user* user, int argc, char** argv) {
     
+    /* Free any past value */
+    free((char *) user->info.timezone);
+    
     /* Store timezone, if present */
     if (argc > 0 && strcmp(argv[0], ""))
         user->info.timezone = (const char*) strdup(argv[0]);
@@ -393,6 +396,9 @@ int guac_user_handle_connection(guac_user* user, int usec_timeout) {
         if (strcmp(parser->opcode, "connect") == 0)
             break;
         
+        guac_user_log(user, GUAC_LOG_DEBUG, "Processing instruction: %s",
+                parser->opcode);
+        
         /* Loop available opcodes and run handler if/when match found. */
         __guac_handshake_mapping* current = __guac_handshake_map;
         while (current->opcode != NULL) {
diff --git a/src/protocols/kubernetes/settings.c b/src/protocols/kubernetes/settings.c
index 4f00a445..6e8ddd41 100644
--- a/src/protocols/kubernetes/settings.c
+++ b/src/protocols/kubernetes/settings.c
@@ -25,6 +25,14 @@
 
 /* Client plugin arguments */
 const char* GUAC_KUBERNETES_CLIENT_ARGS[] = {
+    /**
+     * This first argument defines the protocol version in use so that the
+     * client knows how to handle talking to different versions of guacd.
+     * If this is omitted the client may choose not to enable certain
+     * features.
+     */
+    "VERSION_1_1_0",
+    
     "hostname",
     "port",
     "namespace",
@@ -55,6 +63,11 @@ const char* GUAC_KUBERNETES_CLIENT_ARGS[] = {
 
 enum KUBERNETES_ARGS_IDX {
 
+    /**
+     * The protocol version provided to the client.
+     */
+    IDX_PROTOCOL_VERSION,
+    
     /**
      * The hostname to connect to. Required.
      */
diff --git a/src/protocols/rdp/rdp_settings.c b/src/protocols/rdp/rdp_settings.c
index e5aa85dd..9edcb746 100644
--- a/src/protocols/rdp/rdp_settings.c
+++ b/src/protocols/rdp/rdp_settings.c
@@ -42,6 +42,14 @@
 
 /* Client plugin arguments */
 const char* GUAC_RDP_CLIENT_ARGS[] = {
+    /**
+     * This first argument defines the protocol version in use so that the
+     * client knows how to handle talking to different versions of guacd.
+     * If this is omitted the client may choose not to enable certain
+     * features.
+     */
+    "VERSION_1_1_0",
+    
     "hostname",
     "port",
     "domain",
@@ -124,6 +132,11 @@ const char* GUAC_RDP_CLIENT_ARGS[] = {
 
 enum RDP_ARGS_IDX {
 
+    /**
+     * The protocol version sent to the client.
+     */
+    IDX_PROTOCOL_VERSION,
+    
     /**
      * The hostname to connect to.
      */
diff --git a/src/protocols/ssh/settings.c b/src/protocols/ssh/settings.c
index a0af9f9b..a404e8ca 100644
--- a/src/protocols/ssh/settings.c
+++ b/src/protocols/ssh/settings.c
@@ -30,6 +30,14 @@
 
 /* Client plugin arguments */
 const char* GUAC_SSH_CLIENT_ARGS[] = {
+    /**
+     * This first argument defines the protocol version in use so that the
+     * client knows how to handle talking to different versions of guacd.
+     * If this is omitted the client may choose not to enable certain
+     * features.
+     */
+    "VERSION_1_1_0",
+    
     "hostname",
     "host-key",
     "port",
@@ -66,6 +74,11 @@ const char* GUAC_SSH_CLIENT_ARGS[] = {
 };
 
 enum SSH_ARGS_IDX {
+    
+    /**
+     * The protocol version 
+     */
+    IDX_PROTOCOL_VERSION,
 
     /**
      * The hostname to connect to. Required.
diff --git a/src/protocols/telnet/settings.c b/src/protocols/telnet/settings.c
index 890d5fec..4d2d4dd1 100644
--- a/src/protocols/telnet/settings.c
+++ b/src/protocols/telnet/settings.c
@@ -31,6 +31,14 @@
 
 /* Client plugin arguments */
 const char* GUAC_TELNET_CLIENT_ARGS[] = {
+    /**
+     * This first argument defines the protocol version in use so that the
+     * client knows how to handle talking to different versions of guacd.
+     * If this is omitted the client may choose not to enable certain
+     * features.
+     */
+    "VERSION_1_1_0",
+    
     "hostname",
     "port",
     "username",
@@ -60,6 +68,11 @@ const char* GUAC_TELNET_CLIENT_ARGS[] = {
 
 enum TELNET_ARGS_IDX {
 
+    /**
+     * The protocol version provided by the client.
+     */
+    IDX_PROTOCOL_VERSION,
+    
     /**
      * The hostname to connect to. Required.
      */
diff --git a/src/protocols/vnc/settings.c b/src/protocols/vnc/settings.c
index 8f65cfb2..941a2757 100644
--- a/src/protocols/vnc/settings.c
+++ b/src/protocols/vnc/settings.c
@@ -31,6 +31,14 @@
 
 /* Client plugin arguments */
 const char* GUAC_VNC_CLIENT_ARGS[] = {
+    /**
+     * This first argument defines the protocol version in use so that the
+     * client knows how to handle talking to different versions of guacd.
+     * If this is omitted the client may choose not to enable certain
+     * features.
+     */
+    "VERSION_1_1_0",
+    
     "hostname",
     "port",
     "read-only",
@@ -83,6 +91,11 @@ const char* GUAC_VNC_CLIENT_ARGS[] = {
 
 enum VNC_ARGS_IDX {
 
+    /**
+     * The protocol version provided to the client.
+     */
+    IDX_PROTOCOL_VERSION,
+    
     /**
      * The hostname of the VNC server (or repeater) to connect to.
      */