Lately I haven’t been able to use Dreamweaver to edit ASP or PHP pages without it crashing. After a quick search of the web I found that this is a known problem with a fairly simple solution. See the following KB from Adobe: Dreamweaver CS3 crashes after Daylight Savings Time ends.
The title of the post doesn’t really seem relevant at first, but a quick read of the content of the KB shows it to be exactly the problem I was encountering.
Found via Blogvaria.