diff --git a/fhem/CHANGED b/fhem/CHANGED
index a70ae9b62..ed5197bdd 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -512,7 +512,7 @@
   - feature: 14_CUL_WS: better error checking
   - bugfix:  webpgm2 multi line editing is working again
 
-- =DATE= (4.7)
+- 2009-10-23 (4.7)
   - bugfix:  Reattached corrupted CUL device caused uninitialized message
   - bugfix:  CUL/HMS changes, HMS cleanup
   - bugfix:  EM/EMWZ/EMGZ set changed to work in FHEMWEB
@@ -531,3 +531,6 @@
   - feature: dumpdef module from Axel in contrib
   - feature: javascripting support in FHEMWEB (Klaus/Axel)
   - feature: Module 09_BS.pm for brightness sensor added (Boris 2009-09-20)
+
+- ==DATE== (4.8)
+  - bugfix:  loosing data when sending FS20 messages in a group
diff --git a/fhem/FHEM/00_CUL.pm b/fhem/FHEM/00_CUL.pm
index af8d73409..a443df2db 100755
--- a/fhem/FHEM/00_CUL.pm
+++ b/fhem/FHEM/00_CUL.pm
@@ -607,9 +607,8 @@ CUL_AddFS20Queue($$)
     # Write the next buffer not earlier than 0.23 seconds
     # = 3* (12*0.8+1.2+1.0*5*9+0.8+10) = 226.8ms
     # else it will be sent too early by the CUL, resulting in a collision
-    # Experimental value: 0.25 does not always work: 0.3 is better...
     $hash->{QUEUE} = [ $bstring ];
-    InternalTimer(gettimeofday()+0.5, "CUL_HandleWriteQueue", $hash, 1);
+    InternalTimer(gettimeofday()+0.3, "CUL_HandleWriteQueue", $hash, 1);
     return 0;
   }
   push(@{$hash->{QUEUE}}, $bstring);
@@ -624,7 +623,7 @@ CUL_HandleWriteQueue($)
   my $hash = shift;
   my $arr = $hash->{QUEUE};
 
-  while(defined($arr) && @{$arr} > 0) {
+  if(defined($arr) && @{$arr} > 0) {
     shift(@{$arr});
     if(@{$arr} == 0) {
       delete($hash->{QUEUE});
@@ -634,7 +633,7 @@ CUL_HandleWriteQueue($)
     next if($bstring eq "-");
     CUL_XmitLimitCheck($hash,$bstring);
     CUL_SimpleWrite($hash, $bstring);
-    InternalTimer(gettimeofday()+0.5, "CUL_HandleWriteQueue", $hash, 1);
+    InternalTimer(gettimeofday()+0.3, "CUL_HandleWriteQueue", $hash, 1);
   }
 }