diff --git a/build_num b/build_num
index 9fc9eb6c8..cde18752f 100644
--- a/build_num
+++ b/build_num
@@ -1 +1 @@
-#define BUILD_NUM 772
+#define BUILD_NUM 773
diff --git a/doc/ChangeLog b/doc/ChangeLog
index 5efa79997..d9915d80e 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,11 @@
+2009-03-04  vadim  <vadim@vk.crocodile.org>
+
+	* iosacl.cpp (main), FirewallDialog::platformChanged(): fixed bug
+	#2662290: "fwb_iosacl crash after firewall converted from
+	iptables". If user changed platform setting of the firewall
+	object, the program preserved its old version which was invalid
+	for the new platform.
+
 2009-03-02  vadim  <vadim@vk.crocodile.org>
 
 	* RoutingCompiler_ipt_writers.cpp (PrintRule::processNext): finish
diff --git a/src/gui/FirewallDialog.cpp b/src/gui/FirewallDialog.cpp
index c194bda98..597eedbc7 100644
--- a/src/gui/FirewallDialog.cpp
+++ b/src/gui/FirewallDialog.cpp
@@ -179,7 +179,7 @@ void FirewallDialog::platformChanged()
     ]->getResourceStr("/FWBuilderResources/Target/supported_os").c_str();
     if (so.isEmpty()) return;
 
-    QString ho=so.section(",",0);
+    QString ho = so.section(",",0);
     setHostOS( m_dialog->hostOS, ho.toLatin1().constData() );
 
     QString pl = readPlatform(m_dialog->platform);
diff --git a/src/gui/firewalldialog_q.ui b/src/gui/firewalldialog_q.ui
index 96ba62aa2..fc16fa38f 100644
--- a/src/gui/firewalldialog_q.ui
+++ b/src/gui/firewalldialog_q.ui
@@ -33,9 +33,6 @@
      <property name="spacing" >
       <number>2</number>
      </property>
-     <property name="margin" >
-      <number>0</number>
-     </property>
      <item>
       <widget class="QFrame" name="frame3" >
        <property name="sizePolicy" >
@@ -524,7 +521,7 @@
    <sender>platform</sender>
    <signal>activated(int)</signal>
    <receiver>FirewallDialog_q</receiver>
-   <slot>changed()</slot>
+   <slot>platformChanged()</slot>
    <hints>
     <hint type="sourcelabel" >
      <x>20</x>
@@ -556,7 +553,7 @@
    <sender>hostOS</sender>
    <signal>activated(int)</signal>
    <receiver>FirewallDialog_q</receiver>
-   <slot>changed()</slot>
+   <slot>hostOSChanged()</slot>
    <hints>
     <hint type="sourcelabel" >
      <x>20</x>
@@ -569,4 +566,8 @@
    </hints>
   </connection>
  </connections>
+ <slots>
+  <slot>platformChanged()</slot>
+  <slot>hostOSChanged()</slot>
+ </slots>
 </ui>
diff --git a/src/iosacl/iosacl.cpp b/src/iosacl/iosacl.cpp
index e33fc9f6f..b8d639433 100644
--- a/src/iosacl/iosacl.cpp
+++ b/src/iosacl/iosacl.cpp
@@ -262,6 +262,17 @@ int main(int argc, char * const * argv)
         string fwvers = fw->getStr("version");
         if (fwvers == "") fw->setStr("version", "12.x");
 
+        string platform = fw->getStr("platform");
+        string clearACLCmd = Resources::platform_res[platform]->getResourceStr(
+            string("/FWBuilderResources/Target/options/") +
+            "version_" + fwvers + "/iosacl_commands/clear_ip_acl");
+        if (clearACLCmd.empty())
+        {
+            // incorrect version. This could have happened if user converted
+            // firewall platform. See bug #2662290
+            fw->setStr("version", "12.x");
+        }
+
         bool ios_acl_basic=options->getBool("ios_acl_basic");
         bool ios_acl_no_clear=options->getBool("ios_acl_no_clear");
         bool ios_acl_substitution=options->getBool("ios_acl_substitution");
@@ -490,11 +501,8 @@ int main(int argc, char * const * argv)
 
         ofile << endl;
 
-        string vers = fw->getStr("version");
-        string platform = fw->getStr("platform");
-
         ofile << "!" << endl;
-        ofile << "!" << " Compiled for " << platform << " " << vers << endl;
+        ofile << "!" << " Compiled for " << platform << " " << fwvers << endl;
 
         ofile << "!" << endl;
         ofile << "!" << MANIFEST_MARKER << "* " << ofname << endl;