Comment 19 for bug 462828

> Ubuntu One files may become unavailable in some circumstances

> A bug in the ubuntu one client (#462828) can cause files to become unavailable in some circumstances.

My understanding is that this is not "in some circumstances", but that the Ubuntu 9.10 release version of the client has been forcibly disabled on the server to prevent possible data loss. Is there any reason then for this circumlocution? Should we not simply tell users "the client won't let you sync files, it's been disabled out of a healthy abundance of concern for you data, please upgrade to the new version of the client"?

Here's some text that I think achieves this:

   A serious bug in the Ubuntu One client software included in Ubuntu 9.10 that could potentially result in loss of data has led to
   disabling file syncing access for this client version on the Ubuntu One servers as a precaution. Users who see a "Capabilities
   Mismatch" error when trying to use Ubuntu One should install the post-release upgrade of the client that will be made
   available immediately after release, fixing the original bug and restoring file syncing access to the Ubuntu One servers. Files
   are still available via the web interface at [[http://one.ubuntu.com]].

   Contact syncing and tomboy syncing services are not affected by this issue.

This also addresses:
 - "update channel" - accurate, but not terminology we use elsewhere in the release notes; dropped for consistency
 - The text implied the update was already available, which it isn't yet. We can ammend the release notes to use past-tense once it's available.

I've committed this text to <https://wiki.ubuntu.com/KarmicKoala/ReleaseNotes#Ubuntu%20One%20client%20requires%20post-install%20upgrade>, but am leaving the bug task open; if this text is unacceptable for any reason, please let me know.