I have not yet even looked at installing avatars on 3.4 so I'm just making a judgement based on what I know from earlier versions.
Look at line 585 - 592.
Response.Write " </p>" & vbNewLine
if MemberAvatar <> "noavatar.gif" then
response.write" <img src=""" & Reply_MemberAvatar & """ width=""" & intAvatarWidth & """ height=""" & intAvatarHeight & """ border=""" & intAvatarBorder & """>"
end if
Response.Write " </p>" & vbNewLine
if Reply_MemberAvatar <> "noavatar.gif" then
response.write" <img src=""" & Reply_MemberAvatar & """ width=""" & intAvatarWidth & """ height=""" & intAvatarHeight & """ border=""" & intAvatarBorder & """>"
end if