While not usually an issue, if your compressing a json config file, something like:

Code:
{
  yourmama:'isFat',
  response:'HowFatisShe?'
}
from the server and your compressing it with JSBuilder it adds a ";" to the end of the json which results in ''missing ) in parenthetical" if you try to load it and then decode it. This works as a workaround:

Code:
Ext.decode(
 (a.charAt(a.length-1)==';')?(a.slice(0, -1)):a
)