Index: usr.bin/unzip/unzip.c
===================================================================
--- usr.bin/unzip/unzip.c
+++ usr.bin/unzip/unzip.c
@@ -385,6 +385,13 @@
 {
 	int mode;
 
+	/*
+	 * Dropbox likes to create '/' directory entries, just ignore
+	 * such junk.
+	 */
+	if (*path == '\0')
+		return;
+
 	mode = archive_entry_mode(e) & 0777;
 	if (mode == 0)
 		mode = 0755;