Platform: Windows XP sp3
Java: jdk1.6.0_22 b02 (looks like since 6u04)

To reproduce;
1. install Wubi.jar in jre/lib/ext
2. start Notepad demo bundled in jdk
3. open system menu and click Select Input Method
Then, I see hundreds of following in console.
¿
WuBi IM:getAvaliableLocales() is being called.
Test IM:getAvaliableLocales() is being called.
WuBi IM:getAvaliableLocales() is being called.
Test IM:getAvaliableLocales() is being called.
:
:

I tried previous update releases and this is happening in 6u04 and later. But not in latest jdk7. So far seen in Windows only.
Seems like functionality is still okay, however, some tests are affected (most likely by amount of output) and failing.