Makes sense to me. Fixed in Git.

Changes have been made in Git (master):

commit a8481fff8872f9d06b5db26e17761f8b72976714
Author: Michael J Rubinsky <mrubinsk@horde.org>
Date:   Sun Oct 11 19:31:54 2015 -0400

     Bug: 14128 Need Horde_Perms::SHOW here so DAV clients match what
     Kronolith shows.

     Calendars with Horde_Perms::SHOW will show events with "Busy" titles
     only. Use the same logic when fetching events for DAV.

  kronolith/lib/Application.php |    4 ++--
  1 files changed, 2 insertions(+), 2 deletions(-)

http://github.com/horde/horde/commit/a8481fff8872f9d06b5db26e17761f8b72976714

Changes have been made in Git (FRAMEWORK_5_2):

commit c291f4e3627b41c923232dc20e668f20ddc51d7c
Author: Michael J Rubinsky <mrubinsk@horde.org>
Date:   Sun Oct 11 19:24:07 2015 -0400

     Bug: 14128 Need Horde_Perms::SHOW here so DAV clients match what 
Kronolith shows.

     Calendars with Horde_Perms::SHOW will show events with "Busy" titles
     only. Use the same logic when fetching events for DAV.

  kronolith/lib/Application.php |    4 ++--
  1 files changed, 2 insertions(+), 2 deletions(-)

http://github.com/horde/horde/commit/c291f4e3627b41c923232dc20e668f20ddc51d7c

Hi,

I noticed an issue with appointments from shared calendar if only show 
permissions are set.

You are able to see the appointment in the horde web interface, the 
title is "busy".
But if you subscribe to the calender you don't see any appointments in 
evolution or Thunderbird lightning.

I did some debugging and get a http 500 error code and this error message:
        "Calendar does not exist or no permission to edit"

I fixed it by changing line 723 and 764 in the 
kronolith/lib/Application.php file to:
   if (!Kronolith::hasPermission($internal, Horde_Perms::SHOW)) {

After this fix you are able to see the "busy" appointment in 
subscribed calendars.

Shouldn't it be this way?

Kind regards,
Lionne Stangier