453637 - Thai words sometimes sunk on Windows Vista

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[Disorn Homchuenchom]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1 (.NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1 (.NET CLR 3.5.30729)

Firefox sometimes sink Thai words from Thai sentences. This issue occurs only on Windows Vista. It occurs only when Leelawadee fonts are used. After using Firebug to debug the CSS, e.g. change to other font, text is properly displayed. When switch it back to Leelawadee, it is sunk again.

Reproducible: Sometimes

Steps to Reproduce:
1. Open a specified web page.
2. Try to resize a Firefox window.

Actual Results:  
Sometimes, words are sunk!

Expected Results:  
Words must not be sunk.

Actually, I've found this since Firefox beta phase but not sure whether it is a Vista bug (may relate to font) or Firefox bug. After long time of suffering from this issue, I file this bug.

Comment 1

[Disorn Homchuenchom]

Attachment: Screenshot: when it is sunk.

Comment 2

[Disorn Homchuenchom]

Attachment: Screenshot: when it isn't sunk.

Comment 3

[Disorn Homchuenchom]

Attachment: Screenshot: when it is sunk. (2)

Just found that, Tahoma is also sunk as well.

Comment 4

[Tyler Downer [He/Him]]

This is a mass search for bugs which are in the Firefox General component, are
UNCO, have not been changed for 500 days and have an unspecified version. 

Reporter, can you please update to Firefox 3.6.10 or later, create a fresh profile, http://support.mozilla.com/en-US/kb/managing+profiles, and test again. If you still see the issue, please update this bug. If the issue is gone, please set the status to RESOLVED > WORKSFORME.

Comment 5

[Disorn Homchuenchom]

I've no Vista deployment at this moment so I use Windows 7. The result is fine right now.