I've recently acquired a PJ-TX100 and I'm very pleased with it. However, after only 20 hours of use I noticed a green circular blob on the screen 20-30 pixels wide, which is visible on (only) dark pictures. This becomes more focused if I change the focus and is always at the same position on the screen irrespective of how the LCD picture is arranged (e.g. inverted). Through reading other comments in this forum I'm pretty sure this is a dust-blob. It seems that dust-blobs can be removed using an air-duster and I've seen instructions for a panasonic, but can't see any for the Hitachi. Don't feel confident to be the first to try this so has anyone else given it a go? By the way, seen lots of questions about connecting up a Scart to a TX100 - I've used a Scart to 4 Phone RGB Composite Sync cable from www.keene.co.uk and the picture quality is excellent. Regards.