What browsers do you develop for?

Every good web project specification document includes a list of target browsers and platforms. It’s something that I’ve been reviewing here at Mirashade, and I’m interested to know what browsers and platforms like minded developers are ‘developing’ for.

Where possible we’re refraining from developing ‘for’ Internet Explorer versions previous to 6, although we do ensure that our sites don’t become totally unusable in these.

For our most recent project we have devised the following list:

PC:
Microsoft Internet Explorer 6
Netscape Navigator 7.1
Mozilla 1.6
Mozilla Firefox 0.8

Mac:
Netscape Navigator 7.1
Mozilla 1.6
Mozilla Firefox 0.8
Safari 1.2

How does this compare to your browser devlopment list? Let me know…