Probably you're familiar with the sharing button (at least on Firefox and Chrome) offered by Google reader to help you share stuff that don't have feeds. Today, for some reason I realized that mine wasn't working!
After tweeting about it, thanks to Flavio Gomes and @mtobis, I realized what went wrong. Seems like the JavaScript file used by the button was updated, without updating the button script accordingly.
To solve this, all you have to do is set _IS_MULTILOGIN_ENABLED a variable that's not defined (but used) in the script file in the button script. So add something like:
_IS_MULTILOGIN_ENABLED=true;
// or
_IS_MULTILOGIN_ENABLED=false;
// or better
_IS_MULTILOGIN_ENABLED=((typeof(_IS_MULTILOGIN_ENABLED)=="undefined")?false:_IS_MULTILOGIN_ENABLED);
at the beginning of the button script, just to set _IS_MULTILOGIN_ENABLED before it's accessed as "undefined" in the script.
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