I'm trying to reflash my N800 w/ OS2008 again because I've had a number of things not seem to work correctly since my initial purchase and OS upgrade last month. (Maps not downloading, occasional lockups...)

Every time I download RX-34_2008SE_2.2007.51-3_PR_COMBINED_MR0_ARM
from tablets-dev.nokia.com I get a different MD5 checksum, and it never matches the published checksum. What's going on? Am I missing something? I'm downloading with Firefox in Ubuntu Feisty, and Firefox does seem to be doing something odd in adding an additional file extension to an existing one (with a comma inserted!), e.g. xxxx.bin,.bin. But by assigning the filename correctly before the download I avoid that.

If I go ahead and try to flash anyway, when I use the -F switch (per instructions at maemo.org) I get the following message:
If I run it with the -F switch, it seems to look for the device as it should, but then when I switch on the tablet w/ home key depressed, I get:
No flashing happens. Ugh!

I'm becoming a bit disillusioned with my much-anticipated new toy. I had similar problems the first time I flashed the device, but I believe running without the -F switch was what did the trick, though perhaps that was ill-advised? Any help appreciated. TIA.