Hi GRS, it works!!! I just downloaded my ICF (940.266 kB) to the iPronto, what takes nearly 4 hours already. After that I uploaded it to my PC, (the uploaded file has exactly the same size as the downloaded one!) saved it with a new file name on my PC and downloaded it once again to the iPronto. After less than 10 minutes my iPronto was ready for use!
So, at first many thanks for that workaround! But now I'm very interested when Philips will offer a new firmware solving that problem...