This is because I read today the news about Malaysia banning of a comic book using the word "Allah" to describe its hero. (Al Jazeera)
For me I feel that using it in such context is defaming to Islam, as it diverges Allah meaning to just a synonym word for God. Some argues that Christians use it, and it is true, but they usually use it as "Allah the Father" to distinguish it from Islamic concept of Allah.
Another thing is that Allah implies Islam most of the time, so when you one hears the word Allah, Islam what comes to mind first, and its different from when one is using God, as it refers to a deity or a supreme creature of any religion.
Is there a discussion between scholars on this matter or similar things happening somewhere else? And what is Islam position on this matter?