[wp-trac] [WordPress Trac] #39550: Some Non-image files fail to upload after 4.7.1

[WordPress Trac]

#39550: Some Non-image files fail to upload after 4.7.1
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 Reporter:  greatislander  |       Owner:  joemcgill
     Type:  defect (bug)   |      Status:  assigned
 Priority:  normal         |   Milestone:  4.7.2
Component:  Upload         |     Version:  trunk
 Severity:  normal         |  Resolution:
 Keywords:  needs-patch    |     Focuses:
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Comment (by Njones35):

 Not sure if this helps, but I have this issue (can't upload .csv files) on
 my Linux hosted sites after I upgraded to 4.7.1 - regardless of php
 version (I tried everything from 5.3 up to 7.1). I'e tried deactivating
 all plugins, reverting to TwentySixteen - I even installed a plugin which
 is supposed to allow extra file types and specifically whitelisted csv
 files - but the issue persists.

 But - my localhost sites running on a windows server are unaffected and I
 can upload just like i used to.

 I'm a non-coder so not sure if the Linux vs Windows thing is significant -
 I'm not even sure how to test it properly,.. but hopefully its a clue to
 help someone cleverer than me figure it out.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39550#comment:25>
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