Webform 4.0-alpha1 gives pdo fatal errors when adding a textfield

Hey,

I upgraded to 4.0-alpha1 because I needed the token support. I did activate it, created a new webform and wanted to add a textfield when I got this error:

Original

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT s.lid, t.translation, s.version FROM {locales_source} s LEFT JOIN {locales_target} t ON s.lid = t.lid AND t.language = :language WHERE s.source = :source AND s.context = :context AND s.textgroup = 'default'; Array ( [:language] => nl [:source] => Optional. You may organize your form by placing this component inside another fieldset. [:context] => ) in locale() (line 684 of /modules/locale/locale.module).

Additional

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: INSERT INTO {watchdog} (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9); Array ( [:db_insert_placeholder_0] => 1 [:db_insert_placeholder_1] => php [:db_insert_placeholder_2] => %type: !message in %function (line %line of %file). [:db_insert_placeholder_3] => a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:455:"SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT s.lid, t.translation, s.version FROM {locales_source} s LEFT JOIN {locales_target} t ON s.lid = t.lid AND t.language = :language WHERE s.source = :source AND s.context = :context AND s.textgroup = 'default'; Array ( [:language] => nl [:source] => Optional. You may organize your form by placing this component inside another fieldset. [:context] => ) ";s:9:"%function";s:8:"locale()";s:5:"%file";s:77:"/modules/locale/locale.module";s:5:"%line";i:684;s:14:"severity_level";i:3;} [:db_insert_placeholder_4] => 3 [:db_insert_placeholder_5] => [:db_insert_placeholder_6] => /node/40/webform/components/new/textfield?name=Test&mandatory=0&pid=0&weight=0 [:db_insert_placeholder_7] => /node/40/webform/components [:db_insert_placeholder_8] => 89.98.119.160 [:db_insert_placeholder_9] => 1337690508 ) in dblog_watchdog() (line 154 of /modules/dblog/dblog.module).


Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 2006 MySQL server has gone away' in /includes/database/database.inc:2136 Stack trace: #0 /includes/database/database.inc(2136): PDOStatement->execute(Array) #1 /student/includes/database/database.inc(664): DatabaseStatementBase->execute(Array, Array) #2 /includes/database/database.inc(2315): DatabaseConnection->query('SELECT expire, ...', Array, Array) #3 /includes/lock.inc(167): db_query('SELECT expire, ...', Array) #4 /includes/lock.inc(146): lock_may_be_available('theme_registry:...') #5 /includes/theme.inc(447): lock_acquire('theme_registry:...') #6 /include in /includes/database/database.inc on line 2136

My drupal install:
lates release of drupal with locale enabled (Dutch locale)