<p>I am having a problem with FCKeditor reverting html entities entered in the source view back to their original unicode representations. 
For example when I enter <code>&amp;euro;</code> into the source view, switch to html and then back to source view, the entity is replaced by an actual € symbol. 
The bigger problem, as a result, is that this unicode character is then sent back to the server on submit causing character encoding issues with the underlying database table.
Anyone else come across this?
I have tried many combinations of config settings but all to no avail.</p>

What version of FCKeditor are you using?  The current version is 2.6.3.  I tested the € symbol in their demo by copying
```
&euro;
```
into source view, switched back to display and then back to HTML the ASCII
```
&euro;
```
was retained correctly.  As such it sounds like there might be a configuration problem with your install of FCKEditor or you need to upgrade.
Edit:
Just found this gem in the FCKEditor documentation:
http://docs.fckeditor.net/FCKeditor_2.x/Developers_Guide/Configuration/Configuration_Options/ProcessNumericEntities