Google products plugin - encoding

I have problem with charset encoding.

On server is setup:

Accept-Charset: ISO-8859-1,UTF-8;q=0.7,*;q=0.7
In the xml feed is UTF-8.

I see wrongly some characters.
For example: Krbová vložka
Corect: Krbová vložka

Hikashop is setup for Czech language.

What can I do to see the characters correctly?

Regards for help.

Thank you for explanation. I supposed that there will be problem.
I used Xray to open this file and I saw problem. Notepad or Dreamweaver shoud me file correctly.

I hope. We need to use xml feed not for Google only. So it is important that the characters are display correctly.

Still question:
How I can say to the system, that file with feed will be always saved to root directory?
Example: www.myweb.cz/feed.xml

I see, but problem is that the file will be generated automaticaly and FTP connection will not be used.
As I wanted to know if there is some way how to setup in plugin that the xml file, which will be generated automacicaly, will be always save in root directory.

The customer or price comperator receive the url of the file and the can upload them from this.

Do you see any solution for that?

I am very sorry, but I am not sure if we understand both the problem which I need to solve.

The subscriber ( customer or price comparater) need to upload the file automaticaly from the url.
The file must be saved best in root directory with some name of the xml file.
As I wrote in example.

The upload on the subscribers side is done by robot ( or cron) automaticaly.

I didn´t find the place, where the file is saved after his automatic generation.
So only way I see is to download file every day manualy and save it in root (or other) directory. Then the subscriber has him available.
This solution is not acceptable because expected to do it manualy every day and think about it.