Some command line statements that will show the issue. > db.stacks.find() { "_id" : "S00001" , "name" : "stack S00001" , "description" : "description right beneath early feel as cars and give one little able animals good try food my a in drinks kids education use events design or ", " authorId " : " U00001 ", " published " : true , " popularity " : 0, " galleryId " : " G00001 ", " popularityHistory " : [ ], " popularityDate " : ISODate(" 2012-04-18T23:26:14Z "), " comments " : [ ], " blocks " : [ ], " updatedDate " : ISODate(" 2013-04-18T23:26:15.850Z "), " createdDate " : ISODate(" 2013-04-18T23:26:15.850Z "), " __v" : 0 } > db.stacks.getIndexes() [ { "v" : 1, "key" : { "_id" : 1 }, "ns" : "unit_test.stacks" , "name" : "_id_" }, { "v" : 1, "key" : { "_fts" : "text" , "_ftsx" : 1, "published" : 1 }, "ns" : "unit_test.stacks" , "name" : "textIndex" , "background" : true , "safe" : null , "weights" : { "name" : 1 }, "default_language" : "english" , "language_override" : "language" , "textIndexVersion" : 1 } ] > db.stacks.runCommand( 'text' , {search: 'stack' }) { "queryDebugString" : "stack||||||" , "language" : "english" , "results" : [ { "score" : 0.75, "obj" : { "_id" : "S00001" , "name" : "stack S00001" , "description" : "description right beneath early feel as cars and give one little able animals good try food my a in drinks kids education use events design or" , "authorId" : "U00001" , "published" : true , "popularity" : 0, "galleryId" : "G00001" , "popularityHistory" : [ ], "popularityDate" : ISODate( "2012-04-18T23:28:32Z" ), "comments" : [ ], "blocks" : [ ], "updatedDate" : ISODate( "2013-04-18T23:28:34.387Z" ), "createdDate" : ISODate( "2013-04-18T23:28:34.386Z" ), "__v" : 0 } } ], "stats" : { "nscanned" : 1, "nscannedObjects" : 0, "n" : 1, "nfound" : 1, "timeMicros" : 118 }, "ok" : 1 } > db.stacks.find({published: true }); error: { "$err" : "assertion src\\mongo\\db\\fts\\fts_index.cpp:55" }