[Bug 520314] New: Fonts Rendering Problem on x86_64 Fedora 11

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Summary: Fonts Rendering Problem on x86_64 Fedora 11

https://bugzilla.redhat.com/show_bug.cgi?id=520314

           Summary: Fonts Rendering Problem on x86_64 Fedora 11
           Product: Fedora
           Version: 11
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: high
          Priority: low
         Component: pango
        AssignedTo: besfahbo at redhat.com
        ReportedBy: chinwen_lin at yahoo.com
         QAContact: extras-qa at fedoraproject.org
                CC: besfahbo at redhat.com, fedora-fonts-bugs-list at redhat.com
    Classification: Fedora


Created an attachment (id=359193)
 --> (https://bugzilla.redhat.com/attachment.cgi?id=359193)
Messy Display of Gucharmap

Description of problem:
Some specific size of font can not be properly rendered on the x86_64 system.

Version-Release number of selected component (if applicable):
pangomm-2.24.0-1.fc11.x86_64
pango-1.24.5-1.fc11.x86_64
gucharmap-2.26.2-1.fc11.x86_64
cjkuni-ukai-fonts-0.2.20080216.1-26.fc11.noarch
cjkuni-uming-fonts-0.2.20080216.1-26.fc11.noarch
fontconfig-2.7.1-1.fc11.x86_64

How reproducible:
always on x86_64
never on i386

Steps to Reproduce:
1. Do clean install of x86_64, Fedora 11.
2. Use "Traditional Chinese" during the install process
3. Apply the latest update after installation.
4. Take a look at the font size and DPI setting.
   Make sure they are the same as listed below:
    應用程式字型：Sans,10
    文件字型：    Sans,10
    桌面字型：    Sans,14
    視窗標題字型：Sans Bold 10
    固定寬度字型：Monospace 10
    解析度：96 DPI

5. Open "gucharmap" and search the character "糓" (U+7CD4).
6. Change the font size to 12, 11 and 10.

Actual results:
The display of gucharmap become messy.

Expected results:
The display of gucharmap render the font(s) properly.

Additional info:
The following warning message appear on the terminal:
(gucharmap:1997): Pango-WARNING **: shaping failure, expect ugly output.
shape-engine='BasicEngineFc', font='AR PL UMing HK Light 12', text='糔'

(gucharmap:1997): Pango-WARNING **: shaping failure, expect ugly output.
shape-engine='BasicEngineFc', font='AR PL UMing HK Light 11', text='糔'

(gucharmap:1997): Pango-WARNING **: shaping failure, expect ugly output.
shape-engine='BasicEngineFc', font='AR PL UMing HK Light 9.9990234375',
text='糔'

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