I just found out about this bug. Don't know it it was present in a previous release of piwik. Currently I'm using the latest version 2.14.2
When adding a new site or configuring one and entering an URL with and and symbol (&) the resulting db entry for this site will be
& although it just should be
Using the small picture link in the "All Websites" Dashboard will then redirect (in my case) to the wrong url.
Step 1: I create a new website entry in piwik
Step 2: In the textfield titled "URLs" I enter http://www.demosite.com/?var1=1&var2=2 and then i press the save button.
Step 3: On the top right side I click on "All Websites"
Step 4: in the following view I navigate to the entry Demosite an right next to the title there is a small icon which will lead me to the URL I typed in in step 2. But instead of reaching the correct site. Instead of http://www.demosite.com/?var1=1&var2=2 I will be forwarded to http://www.demosite.com/?var1=1&var2=2
Please see my attachment for more information.
I can manually alter the database entry and remove amp; and everything works. But everytime I change some setting for this site I have to remember to manually remove "amp;" or if a colleague of mine changes something while I'm on vaccation finding this bug on his own can be pretty time consuming.
The problem with the encoded url being displayed in thetooltip on all websites dashboard seems meanwhile fixed. Everything else might be handled with #4231 if needed.