Comment 9 for bug 390724

No. Else the UP button should be even smaller. So it is not adapted to the label just like it isn't a theme issue, I tried a dozen themes, nothing fixed it and anyway, the default theme that matters has the issue as well.
If it is indeed adapted to the label, then it definately is a traditional bug since the adaptation is inconsistent (since the UP is so big)

Otherwise I agree its not a traditional bug but it is exactly the sort of issue the 100 bugs project is for.

Quoting From:
https://launchpad.net/hundredpapercuts

"- bugs that are system-wide (Nautilus, Gnome panel, etc), rather than app-specific (F-Spot, OOo, Terminal, etc.)
- bugs that impact standard workflows (like connecting to the network, copying files, browsing folders, etc.), rather than specialised or corner case workflows
- bugs that are easy to address, rather that ones that require significant design or development efforts
- issues with existing features, rather than requests for new features
- bugs that relate to usability and design (like size of the notification bubbles), rather than broken software (e.g. notifications flickering in fullscreen)"

Point by point:
-This is system wide and is to do with Nautilus as stated by first criteria
-It is to do with browsing folders as stated by second criteria
-It is easy to address as stated by third criteria, it won't take a re write or significant tweaking to fix, it's a very minor UI change
-It is to do with an existing feature as stated by fourth criteria
-It is precisely to do with usability AND design as stated by final criteria, besides, the example of the size of notification bubbles in amusingly analogous to this issue of size of the most used file browser button.

I would be hard pressed to find an issue that fits the stated criteria of the 100 bugs project better.