Too lazy to debug 2-years old code, I decided to either upgrade SquirrelMail or find an alternative. That's when I got fortunate enough to stumble upon: Round Cube
THIS THING IS AMAZING. Not just as far as webmails go, but it's an amazing example of Web 2.0 design and user-friendliness at its best! It's one of the most clean, professional code I have ever seen; And the amazingly well-thought through, rich set of features, that the code implements.
Even if you do not need a webmail, you have to see this toy, to once again re-affirm how beautiful, simple, elegant and comfortabel a web 2.0 app can be (there is a demo on the website).
I have no doubt that Round Cube will make a lot of buzz and will soon (give it a year?) become de-facto standard, role-model for webmails.
Two thumbs up!