PeterH:
I used IDE 1.0.4 on Windows 7 Pro 64-bit to upload the code in the original post to a UNO R3, and pin 13 blinked briefly at a bit less than 1Hz. That's what I'd expect from that code. Then I tried again using IDE 1.5.2 - no problem there either. In other words, I couldn't reproduce the problem.Has anyone else reproduced the problem?
I have not been able to reproduce the failure on IDE 1.5.4