diff -Naudr dovecot-1.0.alpha2/src/lib-storage/index/maildir/maildir-storage.c dovecot-1.0.alpha2-colons/src/lib-storage/index/maildir/maildir-storage.c
--- dovecot-1.0.alpha2/src/lib-storage/index/maildir/maildir-storage.c	Sun Aug 14 17:51:35 2005
+++ dovecot-1.0.alpha2-colons/src/lib-storage/index/maildir/maildir-storage.c	Thu Sep 15 19:06:27 2005
@@ -41,6 +41,7 @@
 	struct index_storage *istorage;
 	const char *root_dir, *inbox_dir, *index_dir, *control_dir;
 	const char *home, *path, *p;
+	const char *q1, *q2;
 	size_t len;
 	pool_t pool;
 
@@ -77,10 +78,17 @@
 		/* <Maildir> [:INBOX=<dir>] [:INDEX=<dir>] [:CONTROL=<dir>] */
 		if (debug)
 			i_info("maildir: data=%s", data);
-		p = strchr(data, ':');
-		if (p == NULL)
+		q1 = strchr(data, ':');
+		q2 = strchr(data, '=');
+		if (q1 == NULL || q2 == NULL)
 			root_dir = data;
 		else {
+			do {
+				p = q1;
+				q1 = strchr(p, ':');
+				q2 = strchr(p, '=');
+			} while (q1 && (!q2 || q1 < q2));
+
 			root_dir = t_strdup_until(data, p);
 
 			do {
@@ -155,8 +163,21 @@
 	int debug = (flags & MAIL_STORAGE_FLAG_DEBUG) != 0;
 	struct stat st;
 	const char *path;
+	const char *p, *q1, *q2;
 
-	data = t_strcut(data, ':');
+	p = NULL;
+
+	q1 = strchr(data, ':');
+	q2 = strchr(data, '=');
+	if (q1 && q2) {
+		do {
+			p = q1;
+			q1 = strchr(p, ':');
+			q2 = strchr(p, '=');
+		} while (q1 && (!q2 || q1 < q2));
+	}
+	if (p != NULL)
+		data = t_strdup_until(data, p);
 
 	path = t_strconcat(data, "/cur", NULL);
 	if (stat(path, &st) < 0) {