[tbb-bugs] #16028 [Tor Browser]: Many users seem to be failing incremental updates to 4.5.1

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#16028: Many users seem to be failing incremental updates to 4.5.1
-------------------------+--------------------------
 Reporter:  mikeperry    |          Owner:  tbb-team
     Type:  defect       |         Status:  new
 Priority:  major        |      Milestone:
Component:  Tor Browser  |        Version:
 Keywords:  tbb-updater  |  Actual Points:
Parent ID:               |         Points:
-------------------------+--------------------------
 More than half of our users appear to be failing the incremental updates.
 From one of our mirror's webserver logs for yesterday:

 {{{
 $ grep "incremental.mar" dist.torproject.org-access.log-20150514 | grep -v
 "GET /torbrowser/4.0.8/" | grep 4.5.1 -c
 81575
 $ grep ".mar " dist.torproject.org-access.log-20150514 | grep -v "GET
 /torbrowser/4.0.8/" | grep -v incremental | grep -c 4.5.1
 50235
 }}}

 Could this be due to the HTTPS-Everywhere update in 5.0.4? I wonder if
 something about how it is being unpacked is causing the force-update in
 the incrementals to fail..

 (The grep -v for the 4.0.8 update is due to another issue.. We have a lot
 of users also trying to download 4.0.8 mars for some reason).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16028>
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