diff --git a/docs/chapters/using_sniff.xml b/docs/chapters/using_sniff.xml
index cbe3bcb..2106024 100644
--- a/docs/chapters/using_sniff.xml
+++ b/docs/chapters/using_sniff.xml
@@ -52,17 +52,16 @@ simtrace - GSM SIM and smartcard tracing
     <section id="known_firmware_issues">
         <title>Known Firmware Issues</title>
         <para>The current firmware has two known bugs that limit the usage
-        of the device. The first one is with enumeration on USB 3.0 controllers
-        and the second one with baudrate selection of some SIM cards.</para>
+        of the device. There is a problem with the enumeration on USB 3.0
+        controllers and the second is related to enumeration on OS X (Lion).
+        </para>
 
         <para>The firmware does not properly enumerate on systems with USB 3.0
         controllers. The issue has not been analyzed and the workaround is to
         use a USB &lt; 3.0 port or put a USB &lt; 3.0 hub between.</para>
 
-        <para>The firmware has issues with selecting the right baudrate of
-        some SIMcards. The microcontroller will call the parity error interrupt
-        handler and the watchdog will reset the device. There is no workaround
-        for this issue yet.</para>
+        <para>The firmware sends a wrong Zero Length Packet as a response to a
+        GET_DESCRIPTION request. OSX handles this by resetting the device.</para>
     </section>
 
     <section id="other_modes">