wiki recent changes fix

[Simon Michael]

I noticed recent changes was giving a unicode error for all but "last 
day". I have installed a workaround, hopefully a permanent fix for this.

This also makes the user name links work in recent changes, if your home 
page is named appropriately; most of them are. Basically use your user 
name as the name of your home page. You can omit the spaces if you prefer.

Happy new year,
-Simon