diff -rN -u old-smederee/modules/hub/src/main/resources/messages_en.properties new-smederee/modules/hub/src/main/resources/messages_en.properties
--- old-smederee/modules/hub/src/main/resources/messages_en.properties	2025-01-31 23:01:29.629509791 +0000
+++ new-smederee/modules/hub/src/main/resources/messages_en.properties	2025-01-31 23:01:29.633509794 +0000
@@ -191,6 +191,7 @@
 repository.overview.clone.title=Clone this repository
 repository.overview.clone.read-only=read-only
 repository.overview.clone.read-write=read-write
+repository.overview.clone.read-write.help=Please note that you might need to set the DARCS_SCP="scp -O" environment variable on some systems if you get "subsystem request failed" errors during darcs ssh operations.
 repository.overview.clone.read-write.owners-only=Currently only the owner of a repository can use it via ssh.
 repository.overview.download.title=Downloads
 repository.overview.download.link=Source code (.tar.gz)
diff -rN -u old-smederee/modules/hub/src/main/twirl/de/smederee/hub/views/showRepositoryOverview.scala.html new-smederee/modules/hub/src/main/twirl/de/smederee/hub/views/showRepositoryOverview.scala.html
--- old-smederee/modules/hub/src/main/twirl/de/smederee/hub/views/showRepositoryOverview.scala.html	2025-01-31 23:01:29.629509791 +0000
+++ new-smederee/modules/hub/src/main/twirl/de/smederee/hub/views/showRepositoryOverview.scala.html	2025-01-31 23:01:29.633509794 +0000
@@ -77,6 +77,7 @@
                 <fieldset>
                   <input class="pure-input-1" id="clone-readwrite" type="text" value="@{vcsRepositorySshUri.getOrElse("NOT YET IMPLEMENTED!")}" readonly="readonly"/>
                 </fieldset>
+                <small class="pure-form-message" id="clone-readwrite.help">@Messages("repository.overview.clone.read-write.help")</small>
               </form>
               } else {
                 <p>@Messages("repository.overview.clone.read-write.owners-only")</p>
diff -rN -u old-smederee/README.md new-smederee/README.md
--- old-smederee/README.md	2025-01-31 23:01:29.629509791 +0000
+++ new-smederee/README.md	2025-01-31 23:01:29.629509791 +0000
@@ -26,6 +26,9 @@
 
 1. An RSA key is required!
 2. A custom port is used!
+3. Problems with newer SSH implementations due to changed `scp`!
+
+### Using a custom ssh port ###
 
 To make darcs use the custom port either set the `SSH_PORT` environment
 variable (`SSH_PORT=30983 darcs clone ...`) or configure your ssh client
@@ -45,6 +48,18 @@
 With such a configuration you should be able to use `darcs clone` etc.
 without having to set the environment variable.
 
+### Fixing problems with scp ###
+
+On some systems the `scp` command will use `sftp` internally which will
+cause operations to break because we currently do not have a working SFTP
+repository access layer. But you can circumvent the issue by providing a
+flag (custom `scp` command to darcs) by using the `DARCS_SCP` environment
+variable:
+
+```
+% DARCS_SCP="scp -O" SSH_PORT=30983 darcs clone ...
+```
+
 ### Protecting endpoints ###
 
 If an endpoint is intended to be used only by guests (users that are not