Chris
Re-sampling is more than slightly off topic for this thread.
The main problem with up or down sampling is which bits do you throw away or expand. The problem is made worse if the re-sizing is not a multiple of the original. i.e your scaling by 1.4567 %. Beat patterns can occur in the image due to pixels within image information changing in position or being added or dropped. After rescaling some techniques apply a dithering to hide regular beat patterns.
I am afraid I don't have a great deal of experience of re-sampling images. A lot of my postings are 100% crops or down-sampled using bi-linear.
Maybe Nigel Blake can offer some input on this topic.
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