Thank you! Maybe it was the original Archos Eclair firmware that i heard was buggy? Now i can't see why Froyo is considered to be better than Eclair.. what is its advantage? Newer apps?
The very first one for the RK2808 was bugy indeed. The next versions were all good but limited compared to the custom roms.
If you are using Mac OS X Tiger (10.4) and it works OK (and I 'm sure it does), then why go to Leopard (10.5), Snow Leopard (10.6) or Lion (10.7).
Or if Ubuntu 10.4 works good, why upgrade to 10.10?
Or for that matter: If XP runs OK on your pc, then why go to Vista or windows 7? (why run Windows anyway
Froyo's memory management is much improved and it's JIT compiler is much better. The better memory management helps you but at the same time the memory footprint of froyo is bigger and the Archos has little memory. The JIT compiler uses a lot of builtin CPU functions and the RK2818 CPU only supports a small subset (and the RK2808 not at all), so that's not really a big improvement.
Froyo supports applications from the SDCard if you format your SDCard to have two partitions: an EXT3 and a FAT32 partition. But that one isn't really useful as the internal data memeory of the Archos is by far big enough: 500MB. Some phones have no more than 20-50MB.
Froyo is simply the way forward and has already been passed by gingerbread, honecomb and the very soon to be released ice cream sandwich (note the first letter of every next version).