Android App Name Trademark
I've just received an email in which a person sends me a message that one of my Apps on the market should be updated with a new name since their company has a trademark on a word since some years.
They also say it would confuse their users -> They have released iPhone Apps but not Android.

Now my questions:
1. I live outside the US (Europe...), does this change anything?
2. Can they really force me to change the App Name of my App?
3. If they can, can I just change the App Name or do I have to change my packagename etc.?


Thanks in advice.
Android App Name Trademark
===

I've just received an email in which a person sends me a message that one of my Apps on the market should be updated with a new name since their company has a trademark on a word since some years.
They also say it would confuse their users -> They have released iPhone Apps but not Android.

Now my questions:
1. I live outside the US (Europe...), does this change anything?
2. Can they really force me to change the App Name of my App?
3. If they can, can I just change the App Name or do I have to change my packagename etc.?


Thanks in advice.