[Morrighan256]

I don't know if anyone has mentioned this yet, but you can also make the font option a pull-down menu. Keep in mind I know almost nothing, but instead of this:

Step 2
Go to User Profile Fields >> Add New User Profile Field

Choose A "Single-Line Text Box"

Title: "Your Font In Posts"

Description: This is the font in which will appear in your posts. (Ex: Tahoma)

Display Size: 15

Max length of allowed user input: 20

I did:

Step 2
Go to User Profile Fields >> Add New User Profile Field

Choose A "Single-Selection Menu"

Title: Your font in posts

Description: Select the font you would like to set as default for your posts.

Options:

Arial
Arial Black
Arial Narrow
Book Antiqua
Century Gothic
Comic Sans MS
Courier New
Franklin Gothic Medium
Garamond
Georgia
Impact
Lucida Console
Lucida Sans Unicode
Microsoft Sans Serif
Palatino Linotype
System
Tahoma
Times New Roman
Trebuchet MS
Verdana

Set default: Yes, but No First Blank Option

Field Required: No

Field editable by user: Yes

It's easier, because (from my understanding) they don't have to try to guess what fonts are available. They just click the pull-down and select. Everything else is the same.

It's working in my forum, anyway.