I've been using bootloader v5.5229 on my old 910 for some time and it's been working well.
Recently I was bored, so decided to tinker with a few new Navcores which updated my bootloader to v5.5256.
Since then my GPS reception has been poor and kept dropping out.
Using your Bootloader 0.0001 worked brilliantly.
I'm now back to the official bootloader for my 910 and its working fine again.
I think I'll leave it as it is until I get the urge to mess with it again.
Thanks so much!