It wasn't a dividend. It was a reduction of your cost base.

Here is a direct quote from the new release from August 12, 2013:

A tax free cash distribution of $0.0275/share as a return of capital has been declared to shareholders of record on Tuesday, August 20, 2013 (the "Record Date"). In general terms, a return of capital is not included in income by shareholders but does reduce the cost of a share for income tax purposes.

The full news release can be seen here:

http://www.copperfoxmetals.com/s/NewsReleases.asp?ReportID=597528&_Title=Copper-Fox-Provides-Update-on-Corporate-Activities

What it means is that your original purchase price decreased slightly (by $0.0275 per share).

So if you sold shares after August 20, 2013 up to December 31, 2013, you need to adjust your case base. For example, if you had a cost base of $1.0275 previously, it would now be $1.00. So if you sold shares in this scenario, your loss would be less.

Of course you may have sold then purchased multiple times. If you sold all your shares after August 20, then bought more shares, your cost base for your new share purchase, would not be affected by this return of capital.

If you shares are sitting in a TFSA or RSP, you don't need to worry about this.

Feel free to pm if you have further questions or want more detail.