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Software | Vista Sidebar: Calendar gadget shows a white border after installing Internet Explorer 9

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Contents of this article

Solution
Reason

[imgright]./upload/files/1_sidebar_calendar_opaque.jpg[/imgright] The calendar gadget shows a white border after installing Internet Explorer 9 on Windows Vista. The solution is to replace the gadget with the one from Windows 7.
[aname=heading-1][/aname][h3]Solution[/h3]
First, close the calendar gadget. The sidebar itself can remain running.
The gadgets are stored in [i]C:\Program Files\Windows Sidebar\Gadgets[/i]. The location [i]C:\Program Files (x86)\Windows Sidebar\Gadgets[/i] can be safely ignored when running a 64bit Windows.
You must take ownership of the folder under the security settings and then grant yourself write permissions. The quickest way to do this is through the command line:
[highlight]takeown /f "C:\Program Files\Windows Sidebar\Gadgets" /r /d y
icacls "C:\Program Files\Windows Sidebar\Gadgets" /grant %username%:F /t /c /q[/highlight]
Next, delete the [i]Calendar.Gadget[/i] folder and download the Windows 7 version: [inturl=./upload/files/1_calendar.gadget.zip]Calendar.Gadget.zip[/inturl].
Extract it into [i]C:\Program Files\Windows Sidebar\Gadgets[/i], and afterwards you can load the calendar gadget in the sidebar again. The white border will be permanently gone.
[aname=heading-2][/aname][h3]Reason[/h3]
Internet Explorer 9 introduced a new rendering engine (based on Direct2D) under Vista, which no longer handled certain PNG transparency formats (premultiplied alpha vs straight alpha) used by the original Vista gadgets correctly. This caused white or grey borders to appear around semi-transparent graphical elements in some gadgets (Calendar, Clock, Currency, etc.).

Microsoft silently fixed this in Windows 7 by re-exporting the gadget PNGs—some with proper alpha channels, others as 32-bit PNGs with clean colour edges. The gadget host (sidebar.exe) itself remained essentially the same, so replacing the gadget works perfectly.

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Beitrag (ID: 167) von freaked 283 Klicks | Quelle
Geschrieben: 28.10.2025, 18:11:17 Uhr
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