Windows partition no longer available on startup disk tool

I can no longer see my Windows XP partition from the startup disk tool.
The WinXP partition was created with bootcamp, and it was visible ok on the startup disk. Now it is no longer visible, although it keeps working if I select the partition at startup using the Option (Alt) key.
I suspect the problem is related to the fact that I have installed NTFS-3g and MacFUSE to make the WinXP partition read/wirte, but I have no evidence that this could be the root cause of my problem.
Any hint?
Thanks,
Fede

Hi, me again.
When you found the setupact.log file (from the other thread) did you do a search for "detected boot environment"?

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