Here is an interesting i18n bug for Update Center on OpenSolaris: https://updatecenter2.dev.java.net/issues/show_bug.cgi?id=511
The problem is that Update Center 2.2 does not follow OpenSolaris keyboard settings.
Therefore, you are stick with a English keyboard, and it is not possible to type i18n characters like é, á, ó, í, à, ô, â, etc...
One workaround is to use the Sun ¨Compose¨ key. Here is the list of combinations available to type some characters: http://en.wikipedia.org/wiki/Compose_key
For those who do not have compose key, you can always Copy-Paste the characters you want. If you find any other handy workaround, feel free to share !