Is it just me, or has Oneiric decided that it's going to display file sizes in Nautilus as 'decimal' rather than 'binary'? For example, a file that was 348MB before the upgrade is now 365MB. Working the numbers out, I've figured out that it's now using (bytes / 1,000,000) rather than (bytes / 1,048,576).

I'm rather annoyed at this. I'm used to drive capacity being shown in base 10 units, but not files. Has anybody else noticed this, and is there a way to get it back to the old 'binary' system?

MB is a base 10 unit though, not a base 2 unit. Anything that considers 1048576 Bytes = 1 MB is incorrect. On the other hand, there is a correct unit prefix, eg Mi, which denotes a binary based system. 1MiB = 1048576 bytes. ( http://en.wikipedia.org/wiki/Si_prefix and http://en.wikipedia.org/wiki/Binary_prefix )

Ubuntu's policy on this is here: https://wiki.ubuntu.com/UnitsPolicy

Unfortunately, I couldn't see any way to change the units in nautilus. Ubuntu's policy suggests that it could be made optional; it just doesn't appear to be this way at the moment.