weird permission bug in the webapp

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+### Please describe the problem.
+
+I started the webapp on a pre-existing repo today, and it started adding all sorts of files which I didn't manually add, which is a little bit surprising, but "okay".
+
+The problem is that it would loop over this one file over and over again. Adding it on the commandline yields a proper error, but this doesn't seem to properly propagate to the frontend.
+
+### What steps will reproduce the problem?
+
+Unclear.
+
+### What version of git-annex are you using? On what operating system?
+
+4.20131105-g8efdc1a
+
+### Please provide any additional information below.
+
+Here's the daemon.log:
+
+[[!format sh """
+# If you can, paste a complete transcript of the problem occurring here.
+# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log
+
+add clips/A31-05-12_21.22.amr (checksum...) [2013-11-06 10:21:10 EST] Committer: Committing changes to git
+[2013-11-06 10:21:11 EST] Committer: Adding A31-05-12_21.22.amr
+(Recording state in git...)
+(Recording state in git...)
+add clips/A31-05-12_21.22.amr (checksum...) [2013-11-06 10:21:11 EST] Committer: Committing changes to git
+[2013-11-06 10:21:12 EST] Committer: Adding A31-05-12_21.22.amr
+(Recording state in git...)
+(Recording state in git...)
+add clips/A31-05-12_21.22.amr (checksum...) [2013-11-06 10:21:12 EST] Committer: Committing changes to git
+[2013-11-06 10:21:13 EST] Committer: Adding A31-05-12_21.22.amr
+(Recording state in git...)
+add clips/A31-05-12_21.22.amr (checksum...) [2013-11-06 10:21:13 EST] Committer: Committing changes to git
+[2013-11-06 10:21:14 EST] Committer: Adding A31-05-12_21.22.amr
+(Recording state in git...)
+(Recording state in git...)
+add clips/A31-05-12_21.22.amr (checksum...) [2013-11-06 10:21:14 EST] Committer: Committing changes to git
+# End of transcript or log.
+"""]]
+
+And here's the attempt on the commandline, which is way more informative:
+
+[[!format sh """
+anarcat@marcos:video$ git annex add .
+add clips/96_257.mp3 ok
+add clips/A31-05-12_21.22.amr (checksum...)
+git-annex: /srv/video/.git/annex/objects/z3/96/SHA256E-s260070--46f0d657cdd79032d431e2aebb04b63685ab26e7d00963036e0b64c9f86998f8.22.amr/SHA256E-s260070--46f0d657cdd79032d431e2aebb04b63685ab26e7d00963036e0b64c9f86998f8.22.amr: setFileMode: permission denied (Operation not permitted)
+failed
+"""]]
+
+Turns out that file is owned by root, so it's an expected failure. But the webapp should simply skip this file, not loop over it.
+
+The workaround is obviously to give this file to the proper user. --[[anarcat]]