2003 Nissan Almera 1.5 Petrol Misfire when cold?

My Almera has developed an annoying misfire when cold. I've read all the timing chain stories but this seems a different problem. When the engine is started from cold and driven, it misfires at about 2000rpm, it will continue to do this until the engine has warmed up, then it stops and drives perfectly. I've been getting around this problem by starting the engine, and leaving it to tick over for 10 minutes after which it will be fine. This has gone on for a couple on months. However, I noticed this morning when I indicate, thats now causing the engine to misfire, also, the fog light warning light illuminates on the dash at the same time. Has anyone any ideas?