org-indent-mode shows "noise" in the left-hand margin when using some themes

[Forrest Sedgwick <fgsedgwick@gmail.com>]

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Hello,

1. Open the attached org file using emacs -Q org-indent-text.org
I have emacs version "GNU Emacs 25.2.1 (x86_64-unknown-linux-gnu, GTK+
Version 3.22.10) of 2017-04-22" and thus org version 8.2.10

2. Change to a built-in dark theme: (load-theme 'tsdh-dark)

3. SHIFT-TAB a bit, everything looks fine.

4. Open another emacs using:
emacs -Q -l minimal-org.el org-indent-text.org

5. Now it is org-version 9.0.8.

6. Change to built-in dark theme: (load-theme 'tsdh-dark)

7. SHIFT-TAB a bit, notice that there is subtle "noise" on the left
side in the line-prefix. I've attached a screenshot to show what I'm
talking about. I haven't tried different versions of org to see where
this behavior begins. This also happens on some other themes with dark
backgrounds, but so far it doesn't happen with light backgrounds. Or
if it does it's completely invisible.

Thanks for the help,
-Forrest

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;;; Minimal setup to load latest 'org-mode'
     
;; activate debugging
(setq debug-on-error t
      debug-on-signal nil
      debug-on-quit nil)

;; add latest org-mode to load path
(add-to-list 'load-path (expand-file-name "/home/sedgwick/.emacs.d/elpa/org-20170606"))


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