Thank you all for some very thought provoking advice.
First off, just to clarify I was taught three-pointers first during my tailwheel lessons. Wheel landings came later, I just wanted to clarify I had been taught them (although I do not like them and I am not confident enough to use them, that's a secondary topic!). I do need to spend some more time on them with an instructor, but I don't think that my lack of ability was connected with the problem here. I was rolling out straight without problems and with little need for rudder for at least five seconds before the aeroplane started heading into wind.
My tailwheel instruction was very good, the instructor had far more to teach than I could absorb. Maybe it is time to go back for some more, his parting advice was that I was safe and to come back when I had 50 hours on the aeroplane so he could iron out any little problems then. I think he is right when the wind is down the runway, but in crosswinds i'm not so sure.
FlyingForFun, thank you for an excellent analysis (I did say what type of landing I was doing, wing down, but apart from that!). It made me realise one big mistake - when I landed the stick came straight back, so I lost the into wind aileron. I'm not sure if that caused my problem or not, but it's still a mistake.
SticknRudder, Shaggy Sheep Driver (i'm not sure what that name means) and Kingy, thank you as well. It is the low speed behaviour that is causing me problems, it seems that the 20-30 kts range is the danger area. I'm not really sure what the crosswind limit is (I did know, but my limit is lower than the Jodel's so i've forgotten) but I had hoped that 8 knots would be ok. I think my approach technique is generally good, wing down seems to work well for me and I never had problems with a PA28 up to maximum demonstrated - I know tailwheel aeroplanes are more sensitive. I would think that crosswinds up to 10kts are fairly common where i fly, maybe i'm too keen to fly before I have the basics.
Plenty to think about, thank you. I'm not sure about the responses to my "have you groundlooped" question, hopefully it's just not as bad as i expect - i have visions of the main landing gear failing mid loop, H.S. Plourde (sp?) makes it sound very dangerous. That doesn't seem to be the general experience, which is a relief.
Will.