No bug

r=mkaply
OS/2 only - "." and " " should not be special file system chars on OS/2

mailnews/base/util/nsMsgUtils.cpp

@@ -241,7 +241,7 @@ nsresult NS_MsgHashIfNecessary(nsCAutoString &name)
   nsCAutoString illegalChars("\"/\\[]:;=,|?<>*$");
   const PRUint32 MAX_LEN = 55;
 #elif defined(XP_OS2)
-  nsCAutoString illegalChars("\"/\\[]:;=,|?<>*$. ");
+  nsCAutoString illegalChars("\"/\\[]:;=,|?<>*$");
   const PRUint32 MAX_LEN = 55;
 #else
 #error need_to_define_your_max_filename_length