4.20就發佈了更新，剛剛按檢查才看到
從Changelog中找來的更新內容：
1. Converter: fixed writing of WAV files with odd byte counts (eg. 24-bit
mono).
2. Improved handling of various malformed WAV files.
3. Converter: fixed writing of file types that foobar2000 cannot tag.
4. Fixed “verify integrity of played files” option disabling HDCD & DTS
decoder components.
‧It's a feature of individual decoder components; third party decoder
components such as Monkey's Audio decoder must be updated separately.
5."Add Folder" now skips over hidden files & subfolders.
6. AIFF file format tagging support.
7. Added authenticode signatures to foobar2000 binaries.
8. Added WAV & AIFF attached picture handling (beta 2).
9. Added attached picture transfer option in Converter (beta 2).
10.Support for touchscreen gesture scrolling on Windows 8 tablet devices
(final).
第九項算是用另一種方式解決了我在#1HJJsZAl提到過的問題，
以後應該就可以不用另外留一個封面圖檔在資料夾裡了
至於第六項，或許對有用Apple產品的人影響比較大
在拿itunes轉檔實測之後，確實可以讀得到Tag
不過用FB2K嵌入封面後，標籤又會消失，這應該是bug...
如果是用FB2K直轉的AIFF，嵌封面就沒問題…orz
在Hydrogenaudio回報過後，作者確認下一版會解決
問題似乎是出在ID3的編碼格式不同