以前から疑問に思っていたのですが、私の環境ではThe Acid3 Testの結果が他の方の数値より低かったのです。
もしや！と思いサイト設定の編集から、ユーザースタイルシートとユーザー javascript ファイルを外してリロードすると数値が３増えました。
その後ユーザースタイルシートは元に戻しても変わらず、ユーザー javascript ファイルのどれかが影響していたようです。
もう一つ今更気付いたのは acid3 の枠の右上の空白部分にカーソルをもって行くと？マークが出たのでクリックしてみると、ダイアログ出ました。
内容は以下の通り
<acid3.acidtests.org>
Failed 17 tests.
Test 02 failed: reached expectation 17 when expecting expectation 16
Test 07 failed: range with inserted comment is collapsed
Test 10 failed: expected 'result' but got '' - toString() didn't work for attribute node
Test 18 failed: expected '10' but got '1' - DOCTYPE nodeType wrong
Test 20 failed: null in getElementById() probably terminated string
Test 26 passed, but took 190ms (less than 30fps)
Test 29 failed: expected '2' but got '1' - cloned table had wrong number of children
Test 33 failed: expected '1' but got '0' - whitespace error in class processing
Test 43 failed: expected '1' but got '0' - failure 10
Test 46 failed: expected 'uppercase' but got 'none' - case h failed (index 8)
Test 47 failed: expected 'auto' but got 'default' - control failed
Test 65 passed, but took 270ms (less than 30fps)
Test 70 failed: UTF-8 encoded XML document with invalid character did not have a well-formedness error
Test 71 failed: expected '2' but got '1' - wrong number of children in #document (first test)
Test 79 failed: character position 1, which is between a normal character and the first character of a two-character glyph, is 38800 but should be 10000.
Test 80 failed: kungFuDeathGrip was null
Test 84 failed: expected '0.0000' but got '-0.0000' - toFixed(4) wrong for -0
Test 97 failed: expected 'four' but got 'fail' - data: failed as base64 with spaces
Test 98 failed: expected 'Sparrow' but got '' - document.title did not update dynamically
Total elapsed time: 2.95s
