I encountered the following problem during testing with FitNesse using the hsac-fitnesse-fixtures:
I try to send an email address to a field on a webpage.
However, instead of the '@', the 'é' is filled in.
In other browsers (Chrome, Firefox) I haven't encountered this issue.
SOLUTION: change keyboard settings to the US
Like you already found out: it is a selenium windows issue. Switch to US keyboard layout as workaround.