341054 - Font next to unicode symbol changes

Status: RESOLVED DUPLICATE of bug 332649

(Core :: Graphics, defect)

Description

[Ria Klaassen (not reading all bugmail)]

Some of my bookmarks have an unicode character in their name. 
For a long time they displayed like little squares, but since some hours (or maybe days) they suddenly show their original appearance.
But, I see also that the font next to the character is not the same as it was before.

Steps to reproduce:
- Load testcase and look at the fonts
- In Options > Content > Fonts & Colors > set the font to Verdana and in Advanced uncheck the box "Allow pages to choose.." and watch the change in the fonts
- open Options window again and in Fonts & Colors > Advanced change Proportional to Sans Serif and Sans Serif to Verdana, and hopefully you see the same as the screenshot I'll attach.

Comment 1

[Ria Klaassen (not reading all bugmail)]

Attachment: screenshot of the problem

Comment 2

[Ria Klaassen (not reading all bugmail)]

Attachment: testcase

Comment 3

[Ria Klaassen (not reading all bugmail)]

Attachment: testcase 2

I copied some more characters from my Windows Character Map.
With Proportional to Serif and Serif to Verdana(?) you see the most various results in this case.

Comment 4

[Ria Klaassen (not reading all bugmail)]

*** Bug 341366 has been marked as a duplicate of this bug. ***

Comment 5

[Felix Miata]

Bug 340590 fallout?

Comment 6

[Stuart Parmenter]

We did this before my last patch -- worse even.  This is one of the last big bugs (after we figure out what is going on with some people's font fallbacks) to fix.  I pretty much know how to fix it, I think.

Comment 7

[Justin Kerk]

*** This bug has been marked as a duplicate of 332649 ***