diff --git a/scripts/colo.py b/scripts/colo.py
index b48df6b..2cc76dc 100644
--- a/scripts/colo.py
+++ b/scripts/colo.py
@@ -36,7 +36,7 @@ settings = {
 		"%c13♥ %0%s%o %c13♥",
 		"Format string for text. %0 - %9 are different colours, %s is text, "
 		"%c %b %u %r %o are ^C ^B ^U ^R ^O respectively, and %% is a literal "
-		"percent sign.",
+		"percent sign. %0 is the primary colour that should be used with %s.",
 		),
 	"fgs": (
 		"04,05,06,13",
@@ -71,11 +71,10 @@ settings = {
 		"(profile)_suf, (profile)_fgs, and (profile)_bgs. ",
 		),
 	"greentext_fmt": "%c3> %s",
-	"alert_fmt": "%c1,8/!\\ %c8,1%s%o %c1,8/!\\"
+	"alert_fmt": "%c1,8/!\\%c8,1 %s %o%c1,8/!\\"
 }
 
 
-
 if weechat.register(SCRIPT_NAME, SCRIPT_AUTHOR, SCRIPT_VERSION, SCRIPT_LICENSE,
  SCRIPT_DESC, "", ""):
 	for opt, val in settings.iteritems():
@@ -86,12 +85,24 @@ if weechat.register(SCRIPT_NAME, SCRIPT_AUTHOR, SCRIPT_VERSION, SCRIPT_LICENSE,
 
 	weechat.hook_modifier("input_text_for_buffer", "cb_colo", "")
 
+# prevent looping
+nest = False
+
 def glob_match (haystack, needle):
 	return re.search("^%s$" %
 	 re.escape(haystack).replace(r"\?", ".").replace(r"\*", ".*?"),
 	 needle)
 
+def is_command (string):
+	return (string.startswith("/") and not string.startswith("/ ") and
+	 string != "/" and string.split(" ", 1)[0].split("\n", 1)[0].find("/", 1)
+	 < 0)
+
 def cb_colo (data, mod, buf, input):
+	global nest
+	if nest:
+		nest = False
+		return input
 	buffer_name = weechat.buffer_get_string(buf, "name").lower()
 	output = ""
 	profile = ""
@@ -109,8 +120,7 @@ def cb_colo (data, mod, buf, input):
 	if not input:
 		return input
 
-	if (input.startswith("/") and not input.startswith("/ ") and input != "/"
-	 and input.split(" ", 1)[0].split("\n", 1)[0].find("/", 1) < 0):
+	if is_command(input):
 		for cmd in weechat.config_get_plugin("whitelist_cmds").lower().split(","):
 			if not input.startswith("/%s " % cmd): continue
 			output = "/%s " % cmd
@@ -154,13 +164,15 @@ def cb_colo (data, mod, buf, input):
 				input.replace("\x0f","\x0f%s" % base))
 
 	fmt = "%".join(fmt)
+	nest = is_command(fmt)
 
 	l = (409 - len(fmt) -
 	 int( weechat.info_get("irc_server_isupport_value", "%s,NICKLEN" %
 	 weechat.buffer_get_string(buf, "localvar_server")) )
 	 )
 	o = []
-	for line in input.replace("\r", "").split("\n"):
+	for line in input.replace("\r", "\n").split("\n"):
+		if not line: continue
 		for i in xrange(0, len(line), l):
 			o.append(fmt.replace("%s", line[i:i+l].rstrip()))