No one was talking about naked shorting and manipu

No one was talking about naked shorting and manipulators when the stock was doing well, because there was no evidence of naked shorting and manipulation at that time. The manipulation started with the negative articles and then the Mako article and the Rosen bogus lawsuit. (Although in retrospect I do think there was manipulation upward, so that the shorts could attack the stock from a higher level. BUT at the time, the upward move looked like a reaction to good news.)

Why would anyone talk about something that didn't appear to be a factor? So it makes sense that no one was talking about it when it wasn't evident.

As far as Amarantus (AMBS), the primary naked shorting of that stock was on the Hamburg exchange. AMBS had never listed on that exchange, and repeatedly asked the exchange to de-list them. The exchange refused, so they did the CUSIP change and the stock went up tremendously as shorts covered.
As a postscript, the company then took the kind of toxic financing that IPIX NEVER has taken -- and then had some other bad management decisions and setbacks in their science. So, the company's current awful share price is from company-specific problems.