diff -r bf4f0f312c75 -r d80ac2c011f8 res/layout/preferences.xml
--- a/res/layout/preferences.xml	Sat Mar 13 20:25:15 2010 +0100
+++ b/res/layout/preferences.xml	Sat Mar 13 21:52:35 2010 +0100
@@ -31,7 +31,8 @@
 	<PreferenceCategory android:title="@string/user_preferences">
 		<EditTextPreference android:singleLine="true"
 			android:summary="@string/SettingsText" android:title="@string/settings_account_username"
-			android:key="settings_key_account_username" android:hint="@string/login_username_info_default" />
+			android:key="settings_key_account_username" android:hint="@string/login_username_info_default"
+			android:inputType="textEmailAddress" />
 		<EditTextPreference android:name="password"
 			android:singleLine="true" android:password="true" android:summary="@string/SettingsPassword"
 			android:title="@string/settings_account_password" android:key="settings_key_account_password" />
@@ -63,7 +64,7 @@
 				<EditTextPreference android:singleLine="true"
 					android:dependency="settings_key_proxy_use" android:name="port"
 					android:summary="@string/SettingsProxyPort" android:title="@string/settings_proxy_port"
-					android:key="settings_key_proxy_port" android:hint="@string/comments_proxy_port" />
+					android:key="settings_key_proxy_port" android:numeric="signed" android:hint="@string/comments_proxy_port" />
 			</PreferenceCategory>
 			<PreferenceCategory android:title="@string/proxy_user_settings">
 				<EditTextPreference android:singleLine="true"
@@ -96,7 +97,7 @@
 			<EditTextPreference android:singleLine="true"
 				android:dependency="settings_key_specific_server" android:name="port"
 				android:summary="@string/SettingsAdvancedPortOpt" android:title="@string/settings_xmpp_port"
-				android:defaultValue="5222" android:key="settings_key_xmpp_port"
+				android:defaultValue="5222" android:numeric="signed" android:key="settings_key_xmpp_port"
 				android:hint="@string/comments_xmpp_port" />
 		</PreferenceScreen>
 	</PreferenceCategory>