This isn't well publicised; in fact, I went and paid for an upgrade (which took nearly the full 24 hours to be activated/key sent - I haven't used the key due to this new information) because I needed Parallels to work and hadn't found this forum or the information about 10.4.10 - and have been unable to contact Parallels or their store provider since. I can send emails, but I have had NO responses from them. Anyway. IF you bought the retail boxed version of Parallels from say, an Apple store, in the UK, it's handled by Avanquest. It's also version 2.2 which will update to 2.5. HOWEVER. If you bought after 1st May 2007, you are entitled to a free upgrade to Parallels 3.0. You need to email/fax/post your proof of purchase and a form from the Avanquest website. Parallels do NOT post this information on their website - at least not anywhere obvious - and will charge you Â£27.50 to upgrade. CHECK YOUR RECEIPT. If you know that you bought after May 1st, get the upgrade free, do NOT pay Parallels for it. I've had no progress on being refunded for this and I'm rather annoyed about it, and will probably have to resort to getting my card issuer to chase it up. And yes. This experience will be going in my published review of the software. I'm very unimpressed with SWSoft. When I had an issue with a PocketPC product bought through Handango that was incompatible with my T-Mobile Ameo, I got an instant refund when I explained the issue.