SSH into /Applications/weather.app and copy info.plist to your desktop
convert info.plist with
http://140.124.181.188/~khchung/cgi-bin/plutil.cgi from binary to ascii.
open converted info.plist with an editor, such as notepad or text
name original plist as .old
delete the bold lines and your theme icon will load
copy back the new plist.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleExecutable</key>
<string>Weather</string>
<key>CFBundleIdentifier</key>
<string>com.apple.weather</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleVersion</key>
<string>1.0</string>
<key>SBIconClass</key>
<string>SBWeatherApplicationIcon</string>
<key>SBUsesNetwork</key>
<integer>3</integer>
</dict>
</plist>