diff --git a/libfuse/lib/fuse_lowlevel.cpp b/libfuse/lib/fuse_lowlevel.cpp
index c82e95a5..bf580195 100644
--- a/libfuse/lib/fuse_lowlevel.cpp
+++ b/libfuse/lib/fuse_lowlevel.cpp
@@ -1863,7 +1863,7 @@ fuse_ll_opt_proc(void             *data_,
                  int               key_,
                  struct fuse_args *outargs_)
 {
-  fmt::print(stderr, "* ERROR: unknown option '{}'\n", arg_);
+  fmt::print(stderr, "fuse: ERROR - unknown option - '{}'\n", arg_);
 
   return -1;
 }
diff --git a/src/config.cpp b/src/config.cpp
index ac0fc901..8acdb553 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -173,6 +173,7 @@ Config::Config()
     nullrw.ro =
     pid.ro =
     pin_threads.ro =
+    posix_acl.ro =
     process_thread_count.ro =
     process_thread_queue_depth.ro =
     read_thread_count.ro =
@@ -180,9 +181,9 @@ Config::Config()
     srcmounts.ro =
     version.ro =
     true;
-  congestion_threshold.ro =
+  congestion_threshold.display =
     gid.display =
-    max_background.ro =
+    max_background.display =
     threads.display =
     _mount.display =
     uid.display =
@@ -389,6 +390,7 @@ Config::get(const std::string &key_,
 
   key = str::replace(key_,'_','-');
 
+
   i = _map.find(key);
   if(i == _map.end())
     return -ENOATTR;
@@ -434,8 +436,6 @@ Config::from_stream(std::istream &istrm_)
 {
   int rv;
   std::string line;
-  std::string key;
-  std::string val;
   Config::ErrVec new_errs;
 
   while(std::getline(istrm_,line,'\n'))
@@ -444,13 +444,9 @@ Config::from_stream(std::istream &istrm_)
       if(line.empty() || (line[0] == '#'))
         continue;
 
-      str::splitkv(line,'=',&key,&val);
-      key = str::trim(key);
-      val = str::trim(val);
-
-      rv = set(key,val);
+      rv = set(line);
       if(rv < 0)
-        new_errs.push_back({-rv,key+'='+val});
+        new_errs.push_back({-rv,line});
     }
 
   rv = (new_errs.empty() ? 0 : -EINVAL);
diff --git a/src/mergerfs.cpp b/src/mergerfs.cpp
index 63d6c146..826ca36f 100644
--- a/src/mergerfs.cpp
+++ b/src/mergerfs.cpp
@@ -324,7 +324,7 @@ _main(int    argc_,
           std::string s = err.to_string();
 
           SysLog::error("error: {}",s);
-          fmt::println(stderr,"* ERROR: {}",s);
+          fmt::println(stderr,"mergerfs: ERROR - {}",s);
         }
 
       return 1;
diff --git a/src/option_parser.cpp b/src/option_parser.cpp
index 9d3e3786..4d9459d2 100644
--- a/src/option_parser.cpp
+++ b/src/option_parser.cpp
@@ -121,37 +121,19 @@ _set_default_options(fuse_args *args_)
 
 static
 int
-_parse_and_process_kv_arg(const std::string &key_,
-                          const std::string &val_)
+_process_opt(const std::string &arg_)
 {
   int rv;
-  std::string key(key_);
-  std::string val(val_);
-
-  if(cfg.has_key(key) == false)
-    return 1;
 
-  rv = cfg.set(key,val);
+  rv = cfg.set(arg_);
+  if(rv == -ENOATTR)
+    return OPT_KEEP;
   if(rv < 0)
-    cfg.errs.push_back({-rv,key+'='+val});
+    cfg.errs.push_back({-rv,arg_});
 
   return OPT_DISCARD;
 }
 
-static
-int
-_process_opt(const std::string &arg_)
-{
-  std::string key;
-  std::string val;
-
-  str::splitkv(arg_,'=',&key,&val);
-  key = str::trim(key);
-  val = str::trim(val);
-
-  return ::_parse_and_process_kv_arg(key,val);
-}
-
 static
 void
 _usage(void)