... as common problems that are *not* vulns.
Vulnerabilities in features which are off by default (in the build) and
documented as experimental, are not eligible for a reward and we do not
consider them security problems.
+
+## URL inconsistencies
+
+URL parser inconsistencies between browsers and curl are expected and are not
+considered security vulnerabilities. The WHATWG URL Specification and RFC
+3986+ (the plus meaning that it is an extended version) [are not completely
+interoperable](https://github.com/bagder/docs/blob/master/URL-interop.md).
+
+Obvious parser bugs can still be vulnerabilities of course.