Revisiting the sideaffect (of LOF...lack of feature) of foobar blindly writing tags on custom encoder output. LOF continues to exist in 0.9.4.1.

Repro:
Make custom encoder like:
encoder: C:\Program Files\ogg\oggenc2.exe
extension: ogg
parameters: -c GROUPING="Hello Please Leave Me" -p1 -q7 - -o %d
format: lossy
highest bps: 24

Save.
Choose a file.
Convert it with this custom encoder.
Drag it into Foobar
See the tag for GROUPING. It doesn't exist. Instead you see all kinds of other tags not specified.

The sideaffect is that I can't add custom tags when I'm encoding or alter standard tags.

I second the request - and your marking of it as an "LOF", which is a good way of putting it!

Somewhat related, or would possibly satisfy diablodale's request:

I'd like the possebility of modifying the tags upon encoding. This could be done just by creating a Script which could be chosen in the encoder dialog.