5 つ星中 1つの評価を受けています

As far as just a single letter calls the function, it's useless. But I really hope tto see it fixed soon, it has great potential.

これは以前のバージョン (1.4.1) についてのレビューです。 

Are you using Firefox 2 or Thunderbird 2 on Mac OS X? Otherwise, a single letter calls the function if and only if you selected text previously.