Using Eclipse 3.4 for Java work on Windows, working without a hitch on our fairly large code base. It was actually easier to set up the project than with 3.3. The correct Java version was selected based on the code, the correct libraries were included – I had to do both of those steps manually for our code base using Eclipse 3.3.
Also using the CDT perspective for C++. Haven’t actually built or debugged anything yet, but it’s nice for browsing code. Upwards and onwards.
