diff --git a/src/main/java/de/diddiz/LogBlock/Consumer.java b/src/main/java/de/diddiz/LogBlock/Consumer.java
index 48d8ff2..e1fb205 100644
--- a/src/main/java/de/diddiz/LogBlock/Consumer.java
+++ b/src/main/java/de/diddiz/LogBlock/Consumer.java
@@ -336,7 +336,8 @@ public class Consumer extends TimerTask
 				continue;
 			for (final String player : r.getPlayers())
 				if (!playerIds.containsKey(player) && !insertedPlayers.contains(player)) {
-					writer.println("INSERT IGNORE INTO `lb-players` (playername) VALUES ('" + player + "');");
+					// Odd query contruction is to work around innodb auto increment behaviour - bug #492
+					writer.println("INSERT IGNORE INTO `lb-players` (playername) SELECT '" + player + "' FROM `lb-players` WHERE NOT EXISTS (SELECT NULL FROM `lb-players` WHERE playername = '" + player + "') LIMIT 1;");
 					insertedPlayers.add(player);
 				}
 			for (final String insert : r.getInserts())
@@ -365,7 +366,8 @@ public class Consumer extends TimerTask
 	}
 
 	private boolean addPlayer(Statement state, String playerName) throws SQLException {
-		state.execute("INSERT IGNORE INTO `lb-players` (playername) VALUES ('" + playerName + "')");
+		// Odd query contruction is to work around innodb auto increment behaviour - bug #492
+		state.execute("INSERT IGNORE INTO `lb-players` (playername) SELECT '" + playerName + "' FROM `lb-players` WHERE NOT EXISTS (SELECT NULL FROM `lb-players` WHERE playername = '" + playerName + "') LIMIT 1;");
 		final ResultSet rs = state.executeQuery("SELECT playerid FROM `lb-players` WHERE playername = '" + playerName + "'");
 		if (rs.next())
 			playerIds.put(playerName, rs.getInt(1));
diff --git a/src/main/java/de/diddiz/LogBlock/Updater.java b/src/main/java/de/diddiz/LogBlock/Updater.java
index 3888aa2..6d35c79 100644
--- a/src/main/java/de/diddiz/LogBlock/Updater.java
+++ b/src/main/java/de/diddiz/LogBlock/Updater.java
@@ -199,6 +199,41 @@ class Updater
 			}
 			config.set("version", "1.52");
 		}
+		// Ensure charset for free-text fields is UTF-8
+		// As this may be an expensive operation and the database default may already be UTF-8, check on a table-by-table basis before converting
+		if (config.getString("version").compareTo("1.71") < 0) {
+			getLogger().info("Updating tables to 1.71 ...");
+			final Connection conn = logblock.getConnection();
+			try {
+				conn.setAutoCommit(true);
+				final Statement st = conn.createStatement();
+				if (isLogging(Logging.CHAT)) {
+					final ResultSet rs = st.executeQuery("SHOW FULL COLUMNS FROM `lb-chat` WHERE field = 'message'");
+					if (rs.next() && !rs.getString("Collation").substring(0,4).equalsIgnoreCase("utf8")) {
+						st.execute("ALTER TABLE `lb-chat` CONVERT TO CHARSET utf8");
+						getLogger().info("Table lb-chat modified");
+					} else {
+						getLogger().info("Table lb-chat already fine, skipping it");
+					}
+				}
+				for (final WorldConfig wcfg : getLoggedWorlds()) {
+					final ResultSet rs = st.executeQuery("SHOW FULL COLUMNS FROM `"+wcfg.table+"-sign` WHERE field = 'signtext'");
+					if (rs.next() && !rs.getString("Collation").substring(0,4).equalsIgnoreCase("utf8")) {
+						st.execute("ALTER TABLE `"+wcfg.table+"-sign` CONVERT TO CHARSET utf8");
+						getLogger().info("Table "+wcfg.table+"-sign modified");
+					} else {
+						getLogger().info("Table "+wcfg.table+"-sign already fine, skipping it");
+					}
+				}
+				st.close();
+				conn.close();
+			} catch (final SQLException ex) {
+				Bukkit.getLogger().log(Level.SEVERE, "[Updater] Error: ", ex);
+				return false;
+			}
+			config.set("version", "1.71");
+		}
+		
 		logblock.saveConfig();
 		return true;
 	}
@@ -211,11 +246,15 @@ class Updater
 		final DatabaseMetaData dbm = conn.getMetaData();
 		conn.setAutoCommit(true);
 		createTable(dbm, state, "lb-players", "(playerid INT UNSIGNED NOT NULL AUTO_INCREMENT, playername varchar(32) NOT NULL, firstlogin DATETIME NOT NULL, lastlogin DATETIME NOT NULL, onlinetime INT UNSIGNED NOT NULL, ip varchar(255) NOT NULL, PRIMARY KEY (playerid), UNIQUE (playername))");
+		// Players table must not be empty or inserts won't work - bug #492
+		final ResultSet rs = state.executeQuery("SELECT NULL FROM `lb-players` LIMIT 1;");
+		if (!rs.next())
+			state.execute("INSERT IGNORE INTO `lb-players` (playername) VALUES ('dummy_record')");
 		if (isLogging(Logging.CHAT))
-			createTable(dbm, state, "lb-chat", "(id INT UNSIGNED NOT NULL AUTO_INCREMENT, date DATETIME NOT NULL, playerid INT UNSIGNED NOT NULL, message VARCHAR(255) NOT NULL, PRIMARY KEY (id), KEY playerid (playerid), FULLTEXT message (message)) ENGINE=MyISAM");
+			createTable(dbm, state, "lb-chat", "(id INT UNSIGNED NOT NULL AUTO_INCREMENT, date DATETIME NOT NULL, playerid INT UNSIGNED NOT NULL, message VARCHAR(255) NOT NULL, PRIMARY KEY (id), KEY playerid (playerid), FULLTEXT message (message)) ENGINE=MyISAM DEFAULT CHARSET utf8");
 		for (final WorldConfig wcfg : getLoggedWorlds()) {
 			createTable(dbm, state, wcfg.table, "(id INT UNSIGNED NOT NULL AUTO_INCREMENT, date DATETIME NOT NULL, playerid INT UNSIGNED NOT NULL, replaced TINYINT UNSIGNED NOT NULL, type TINYINT UNSIGNED NOT NULL, data TINYINT UNSIGNED NOT NULL, x MEDIUMINT NOT NULL, y SMALLINT UNSIGNED NOT NULL, z MEDIUMINT NOT NULL, PRIMARY KEY (id), KEY coords (x, z, y), KEY date (date), KEY playerid (playerid))");
-			createTable(dbm, state, wcfg.table + "-sign", "(id INT UNSIGNED NOT NULL, signtext VARCHAR(255) NOT NULL, PRIMARY KEY (id))");
+			createTable(dbm, state, wcfg.table + "-sign", "(id INT UNSIGNED NOT NULL, signtext VARCHAR(255) NOT NULL, PRIMARY KEY (id)) DEFAULT CHARSET utf8");
 			createTable(dbm, state, wcfg.table + "-chest", "(id INT UNSIGNED NOT NULL, itemtype SMALLINT UNSIGNED NOT NULL, itemamount SMALLINT NOT NULL, itemdata TINYINT UNSIGNED NOT NULL, PRIMARY KEY (id))");
 			if (wcfg.isLogging(Logging.KILL))
 				createTable(dbm, state, wcfg.table + "-kills", "(id INT UNSIGNED NOT NULL AUTO_INCREMENT, date DATETIME NOT NULL, killer INT UNSIGNED, victim INT UNSIGNED NOT NULL, weapon SMALLINT UNSIGNED NOT NULL, x SMALLINT NOT NULL, y TINYINT UNSIGNED NOT NULL, z SMALLINT NOT NULL, PRIMARY KEY (id))");
diff --git a/src/main/resources/plugin.yml b/src/main/resources/plugin.yml
index 637fe4e..ce1095d 100644
--- a/src/main/resources/plugin.yml
+++ b/src/main/resources/plugin.yml
@@ -1,5 +1,5 @@
 name: ${project.name}
-version: '1.70'
+version: '1.71'
 author: DiddiZ
 authors: [md_5, ammar2]
 website: http://dev.bukkit.org/server-mods/logblock/