I'm sure I can't be BU.
ExH and I split almost 7 years ago when DS3 was a few months old. DS3 has Downs Syndrome, but this wasn't a factor in the split, it had been on the cards anyway and the pregnancy was unplanned.
I have always got on well with ExH, accepting that he chose to work abroad and saw the DC infrequently. He always paid generous maintenance, which although didn't make up for him not seeing the DC much, was at least something. ExH then 'made up' with his estranged family and decided to get a job in the UK near to them. It meant a huge drop in maintenance but that was fine as I hoped he would see the DC much more. He does have some problems as he had surgery on his spine/neck whilst working abroad and needed further surgery recently. He was on morphine until then and couldn't travel much. He has been inrreasingly 'difficult' since being back in touch with his family.
DH has now worked in the UK again for almost two years and has seen the DC three times in those two years. I offered he could have them last summer and we would meet him half way with them (we do live some distance away, ferry trip and 3-4 hour drive). However, he didn't confirm things and then when he trid to book the time off work he couldn't. So, the last time he saw the DC was Christmas 2009 when they DC went to stay with him.
The final straw was that it was DS3's birthday on Saturday and he didn't get a card or present from his Dad, nor any card, present, phone call from any of ExH's family.
When I asked ExH about it (when he rang to speak to the DC on Sunday) he just said he didn't know why and that was it. They did send things for all 3 DC for Christmas and for DS2's birthday just before Christmas.
Luckily, DS3 doesn't really understand birthdays properly and wouldn't notice the lack of anything from his Dad or his family, but that's hardly the point, is it?! 