4.20就发布了更新，刚刚按检查才看到
从Changelog中找来的更新内容：
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).
第九项算是用另一种方式解决了我在#1HJJsZAl提到过的问题，
以后应该就可以不用另外留一个封面图档在资料夹里了
至于第六项，或许对有用Apple产品的人影响比较大
在拿itunes转档实测之后，确实可以读得到Tag
不过用FB2K嵌入封面后，标签又会消失，这应该是bug...
如果是用FB2K直转的AIFF，嵌封面就没问题…orz
在Hydrogenaudio回报过后，作者确认下一版会解决
问题似乎是出在ID3的编码格式不同