Hoi jaxx. I'm the lucky guy feydrutha mentioned. After installing Pr1.1 i had the same behaviour you mentioned: Nokia screen, no dots, and a shutdown afterwards. If connected to external power, it repeats everything over and over again.

Before the update i had some stuff installed. Nothing fancy, except maybe some apps from the extras repo (but no devel-stuff). You know.. n900fly and the like.

So far i tried the following:
- Flashed to RX-51_2009SE_1.2009.42-11_PR_COMBINED_MR0_ARM.bin --> Works again, most settings still there.

Deleted some files from MyDocs i though could be responsible and updated again (over the air) --> dead
- Flashed directly to: RX-51_2009SE_2.2009.51-1_PR_COMBINED_MR0_ARM.bin --> Dead

So i thought it must be something in the /home/user, so i flashed
RX-51_2009SE_1.2009.41-1.VANILLA_PR_EMMC_MR0_ARM.bin (Resets MyDocs and the user home) and flashed RX-51_2009SE_1.2009.42-11_PR_COMBINED_MR0_ARM.bin --> works again and looks like fresh from the factory.
Flashed RX-51_2009SE_2.2009.51-1_PR_COMBINED_MR0_ARM.bin --> dead
Backflashed to RX-51_2009SE_1.2009.42-11_PR_COMBINED_MR0_ARM.bin --> works.
Updated over the air --> dead
Backflashed to RX-51_2009SE_1.2009.42-11_PR_COMBINED_MR0_ARM.bin --> works.

I think there is no permutation i missed ;-) It must be a problem with the device.

So tomorrow i'll take the pleasure and visit my local "Nokia Care Point", ask them if they would be so kind and install the latest update and see what happens. Meanwhile i can really recommend the Sony Ericsson K510i. With this device you can actually make phone calls.

Cheers, WD