First of all thankx a lot for having a look on my files! I managed to solve the "vertical-align:middle"-issue: I used "float:right;" for positioning of the avatar on the right side. Now I put put "float:right;" one level higher into the "MessageOther"-div - Works! The color #999 is just short for #999999 - Dreamweaver does that automatically (samesame but differente ) Still donīt get it, I mean it works in the standard view with 64x64px. However, changed MessageOtherAvatar to 60x60 and now it looks fine! Download improved Version EDIT: Attached the modded .css and .html files for IM-Conversations.