I have installed 4.2e on Ubuntu 12.04 with a view to migrating our existing 4.0d installation over to this. I installed using the bundle.
Everything seems fine, except the font rendering which is particularly ugly and difficult to read in Firefox and Chrome, but oddly ok in IE. However, we have set up all our users with Firefox as we have experienced trouble with IE and Alfresco in the past!
The font in question is OpenSans. I have seen a bug report regarding a mis-referenced WOFF for this font but this is now closed out.
Am I doing something daft, or is there a tweak to get it looking nice?