nope.
as i said before:
standard bubble is 64 * 64 px.
it annoyed me to see 4 px on the right and bottom which are filled with the actual avatar again.
so i decided to take a look into the three files to get it fixed.
that's why i started to edit all these files.

and because i had some time, i added my own avatar, changed colors and alignments and so on.
but whatever i tried... two things didn't work like i want them to work:
1. file-path in url('...') - didn't get the absolute paths to work. that's why the avatar is stored in the html-folder ^^
2. resizing the avatars to fit in the bubble in the sms conversation. resizing works in chat and singlesms view but it doesn't seem to work in the sms conversation view.

so if the avatar is annoying you too. change the size of the bubbles to 60 * 60 px and resize your avatar pic in the html folder also to this 60 px size.

edit: but my ambition tells me to don't be defeated by a css-file. so i'll try to get these two points to work when i have some time off.