Issue in numeric value 1 color display in GWT application

We are experiencing a strange problem in our application.
The numeric value 1 is getting displayed in burgundy color instead of
black color.
Our application is using

GWT 2.3
Default CSS font is Arial

Particularly this issue is happening only in Windows 7 with 1280 * 800
screen resolution.
MAC environment is working as expected.

We have identified few temporary fixes for this issue. I provided here
the same for reference.
Fix 1 - The issue will go away if we change the screen resolution to
1024 * 768
Fix 2 - If we change the default font to Helvetica, then the numeric
value 1 is displayed in black.

Any thought on this?

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