The extra character is a UTF-8 formatting character. If you see this it probably means that the page is not properly handling the content encoding. Make sure you're using UTF-8 encoding on the page (which is the default). If you're using something else I highly recommend you don't because browsers default to that as well and if it changes you can see odd behaviors at times for thing like caching for example.

+++ Rick ---

>With IE 11, if I have this CHR(250) in a page, it appears ok. If I move to a page and hit the back button of the browser, IE inserts the  character before CHAR(250). I did not observe that before because I had an emulation that in the Meta Head to work with compatility IE 9. So, it seems this is a bug in IE 11. Anyone can confirm that?
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>I had to escape the character. As surprisingly as it gets, on that one, the code to use was 183 as 250 would have given the latin small letter u with acute.