Twitter Bootstrap download from http://twitter.github.com/bootstrap/customize.html contains this error (error.txt, formatted as JS for readability).

gistfile1.js

/*

  A less error occured trying to build your bundle.
  You've likely entered an invalid input into the less variable field.
  Check your syntax and try again!
  thanks!
    
*/

{
  "type": "Parse",
  "message": "Syntax Error on line 792",
  "index": 25106,
  "filename": "bootstrap.css",
  "line": 792,
  "column": 11,
  "extract": ["  *margin: -5px 0 5px;", "  ove rflow: hidden;", "  background-color: @top;"]
}