custom item - html text input being saved without commas

[mfkomorowski]

I've created an html custom item, and when medialab intercepts the POST, it correctly populates the backing variable EXCEPT it omits the commas contained in the text.

i.e.
if the value of the variable in html is
'hello, you have access to items 1,2,3 and 4'
then the value saved in the data files is
'hello you have access to items 1 2 3 and 4'

Is this normal? Is there a way to change this?