Well that is Great,Use Bill's Script if it works for you.
Mine works for me.I used it up to earlier today,when I notice the problem you stated in this post.

So although the core of the modifications  will still use my script proposed,I will  not to make Tunein or any other ApI have direct calls to the liquidsoap because it will pull down your server.

My script was design

• to take in consideration that you have modified the ls_script
• You can use it standalone on any liquidsoap script
• If any library change be it Airtime or Liquidsoap ,you just need to change the source from "s" to your source

Always remember in programming "There is no one way to slew a Giant" ,You can write your own and itr might work for you and not others.

But Your url output you print above carries a number of errors indicating that your script is not encoding properly and is different from my script (I highlight the errors)

http://air.radiotime.com/Playing.ashx?partnerId=xxxxxxx&partnerKey=xxxxxxxxid=xxxxxxx&artist=&title=Excision+&+Savvy+-+Sleepless+(Xilent+Remix)&album=&com
merical=

My script is a suggestion,one of which I have 99.9% confident in

But if you solely use the calendar or with a mod script ,I outline the Santa Claus fixed above

There are many ways to do the script

@John_Chewter way is here https://forum.sourcefabric.org/discussion/16848/tunein-updater-code-for-talk-shows-etc-updates-with-show-info-tested-on-2-5-1

@Yannick way is here https://forum.sourcefabric.org/discussion/17003/another-approach-to-tunein-icecast-playlist

And you are Bill's

Use whichever suits you best.

My only wish is that the team at Sourcefabric would adopt one of them and bring it to WAF and stability and just  abondon that concept  fixing things which by the next distro will break.

People are just yearning to have some of there expectations met and if you have even "one half bake cake you can eat."

Notice I am full of parables and metaphor,Although I might starve,my next job in the other life will be a Guess what "Comedian"

VOISSES

Okay (always copy your info into notepad or gedit before pasting it to the forum to removed the amp)

just make this correction and it will cure the metadata regardless of whether its url encode properly

do this
you can use nano or pico instead of gedit
gedit will give you the line numbers

•  use the santa clause  fix  not the old update title (this fix render it redundant)
  

• sudo gedit /usr/lib/airtime/pypo/bin/liquidsoap_scripts/ls_lib.liq

 
change line 35 to Line 40 to look like this

    if !stream_metadata_type == 1 then
      # [("title", "#{!show_name} - #{m['artist']} - #{m['title']}"), ("mapped", "true")]
        [("title", "#{!show_name} - #{m['title']}"),("artist", "#{m['artist']}"), ("mapped", "true")]


    elsif !stream_metadata_type == 2 then
      #[("title", "#{!station_name} - #{!show_name}"), ("mapped", "true")]
       [("title","#{m['title']}-#{!station_name} - #{!show_name}"),("artist", "#{m['artist']}"), ("mapped", "true")]


    else
   # this is where both title and artist are join as one like icecast metadata called song
       # [("title", "#{m['artist']} - #{m['title']}"), ("mapped", "true")]
         [("title", " #{m['title']}"),("artist", "#{m['artist']}"), ("mapped", "true")]
        
        
 check that there is no error using    
 sudo /usr/lib/airtime/pypo/bin/airtime-liquidsoap --check /usr/lib/airtime/pypo/bin/liquidsoap_scripts/ls_script.liq
 
 you should see something like this
 
 #########################################
#           *** pypo  ***               #
#     pypo notification gateway         #
#########################################

 
 If all is okay stop or restart liquidsoap
 
 sudo service airtime-liquidsoap restart


to see your logs

 sudo airtime-log -t liquidsoap

VOISSES

big thanks, now all works well

2015/01/31 12:45:56 [stdout:3] http://air.radiotime.com/Playing.ashx?partnerId=XXXXXXXX&partnerKey=XXXXXXXXX&id=XXXXXX&artist=DNNYD
+feat.+DyCy&title=+Dont+Hold+Me+Back+%28X-Wise+Remix%29&album=&commerical=
2015/01/31 12:45:57 [lang:3] Server Connected:HTTP/1.1 200 OK <?xml version="1.0" encoding="UTF-8"?>
<opml version="1">
        <head>
        <status>200</status>

        </head>
        <body>
        </body>
</opml> [("cache-control","private"), ("content-type","text/xml; charset=utf-8"), ("server","Microsoft-IIS/8.5"), ("set-cookie","das_fr
_TEST=20150131T094613Z; expires=Mon, 02-Mar-2015 09:46:13 GMT; path=/"), ("x-aspnet-version","4.0.30319"), ("date","Sat, 31 Jan 2015 09
:46:13 GMT"), ("connection","close"), ("content-length","131")]
2015/01/31 12:45:57 [clock.wallclock_main:2] We must catchup 2.15 seconds!