If you thought Acer's move, announced last week, that it will support the Blu-ray Disc optical disc format was a sign it had hopped off the fence, think again. The computer maker - soon to be the world's third largest - today reiterated its support for HD DVD.

Acer's Aspire 5290: HD DVD here

Acer said it has joined the HD DVD Promotional Group, the body charged with persuading World+Dog not to buy the propaganda put out by its opposite number, the Blu-ray Disc Association. Which is, of course, equally busy countering the HD DVD PG's spin. They're both at it.

Acer unveiled its first HD DVD products - laptops fitted with read-only HD DVD drives - back in April 2006. Since then it has released a number of Ferrari and Aspire brand laptops with HD DVD support, most recently the Gem-design Aspire 5920.

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Acer's TravelMate 8210: Blu-ray on board

A die-hard HD DVD backer, then? Well, clearly not given last week's announcement - and the fact that a fair few of its TravelMate laptops are already available with Blu-ray Disc drives aboard.

In short, like LG and Samsung, Acer is, quite sensibly, keeping its options open.