The wipe was in desperation!
But, at least it brought up the HTML switch anomalie. Today, mails are fine and I am a man more intune with machine more than I was last week!
What I was getting (with my old HMTL set to YES) was a list of emails fine - all in 9pt Casual extra bold as I set, but on opening them, the mail headers were in the font I set alright, but the text was in plain, and yes, almost a brown colour. This I do not have set on my work PC, so I am not sure where it was picking it up! Fact is, I am fine now!
I will be OK with the 8900. I just feel that it is not as solid as the 8100, but it is technically a lot better - camera is good and the music set up is certainly faster - although I reserve judgement on that until I fill up a 16Gb card...
My last gripe is that my company has switched off the GPS function - how cheapskate is that, I ask?!
Thanks for everyone's help!