I will try driving the control signal at 5v. I have a Arduino UNO Rev3 arriving in a few days, yeah, I know been using Pi for years, well, it was about time to expand my range of controllers.
Since the Arduino drives logic at 5v, seems perfect time to test this.
The odd thing is, I have an older, about 2 years old strip of 8, that works perfectly with 3.3v logic, and powered at 5v (external). And since it works fine, surprised that the single diode modules don't work with 3.3v logic as well. Will update thread with results once I can test with the Arduino.
Will not be the first time I have had to bump the control logic to 5v using a Pi, if that turns out to be the issue. Also think the timing sensitivity is an issue with these newer components. Should be able determine if that is the issue was well with the Arduino, since it avoids the classic Linux interrupt issue.