Does this mean that Office 2007 (or at least Powerpoint 2007) is incompatible with Trados 6.5? [/quote]
It is incompatible.
If that is the case I would take up the Trados upgrade offer
Yes, I think.
Or you may choose another CAT tool (e.g. Swordfish) if you're not addicted to Trados
- or was this somehow just a freak file?
The Office 2007 file formats are new and completely different.
(the customer has only just started using Office 2007 and say they have already encountered various problems with it). By the way, I did try saving the .pptx file as a lower Powerpoint version but that didn't work - I get some message about the registration settings being blocked followed by "Powerpoint could not convert the file".
Sometimes it works, sometimes no.
And on the same subject: are there any other good reasons why I should upgrade my Trados 6.5?
You got SDLX and a lot of improvements in Tag Editor.
[Edited at 2008-04-22 13:39]