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Vowel/Tone Marker problem in Thai (Firefox) with Monospace font
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Description

Image of issue

As reported by a Thai editor:

"The vowels and tone markers that normally reside above and below
the line are not displayed correctly in FireFox/Ubuntu (on the right
of attached image). These are displayed correctly in Chrome/Ubuntu
(on the left of attached image). The problem occurs only on the box
for wiki text. (both edit/view source)"

See image for demonstration.


Version: 1.22.0
Severity: normal

Attached:

FirefoxIssueThai.png (547×1 px, 125 KB)

Details

Reference
bz52257

Event Timeline

bzimport raised the priority of this task from to Low.Nov 22 2014, 2:02 AM
bzimport set Reference to bz52257.
bzimport added a subscriber: Unknown Object (MLST).

Contact for reporting editor: KaewWiki@gmail.com (Taweetham of the Thai Wikipedia)

(In reply to comment #1)

Contact for reporting editor: KaewWiki@gmail.com (Taweetham of the Thai
Wikipedia)

Editor now on CC list.

Thai (th) is not using the language converter.

Which version of Firefox is this about? I wonder if this is a font issue?

KaewWiki wrote:

Help->troubleshooting information

Application Basics

      Name
      Firefox

      Version
      23.0

      User Agent
      Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:23.0) Gecko/20100101 Firefox/23.0

Please provide the URL / link to the page that was used for the screenshot so others can try to reproduce.

Please provide the URL / link to the page that was used for the screenshot so
others can try to reproduce.

KaewWiki wrote:

(In reply to comment #7)

Please provide the URL / link to the page that was used for the screenshot so
others can try to reproduce.

http://th.wikipedia.org/w/index.php?title=%E0%B8%A7%E0%B8%B4%E0%B8%81%E0%B8%B4%E0%B8%9E%E0%B8%B5%E0%B9%80%E0%B8%94%E0%B8%B5%E0%B8%A2:%E0%B8%97%E0%B8%94%E0%B8%A5%E0%B8%AD%E0%B8%87%E0%B9%80%E0%B8%82%E0%B8%B5%E0%B8%A2%E0%B8%99&action=edit

You can try to edit any page on Thai Wikipedia. It produce the same problem.

วิกิพีเดีย:ทดลองเขียน = Wikipedia:Sandbox
It's quite safe to do your experiment there.

KaewWiki wrote:

I have found a fix for this bug.

firefox preferences -> content -> advanced... -> Fonts for: Thai -> Monospace: change from monospace to anything else. Click OK and you will see the change.

Troubleshooting information after the change will show something like this:

Important Modified Preferences
font.name.monospace.th Tahoma

(In reply to taweethaも from comment #10)

I have found a fix for this bug.

firefox preferences -> content -> advanced... -> Fonts for: Thai ->
Monospace: change from monospace to anything else. Click OK and you will see
the change.

Troubleshooting information after the change will show something like this:

Important Modified Preferences
font.name.monospace.th Tahoma

You may also be able to fix this by adjusting the "Edit area font style" option in [[Special:Preferences#mw-prefsection-editing]]