The "Save and Continue" button on each step of the install process should be a primary button. To quote Luke Wroblewski:

A typical Web form usually enables several “final” actions. Actions like “Submit”, “Save”, or “Continue” are intended to enable form completion –the primary goal of just about anyone who has started filling in a form. Because they enable the most important action on the form (completion), they are often referred to as primary actions.

Files: 
CommentFileSizeAuthor
#5 Screen Shot 2013-09-22 at 15.16.09.png1.11 MBLewisNyman
#2 primary-buttons-2030631-1.patch1.33 KBemma.maria
PASSED: [[SimpleTest]]: [MySQL] 58,539 pass(es).
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Assigned:Unassigned» emma.maria

Assigned:emma.maria» Unassigned
Status:Active» Needs review
StatusFileSize
new1.33 KB
PASSED: [[SimpleTest]]: [MySQL] 58,539 pass(es).
[ View ]

Primary classes have been added to all of the 'Save and continue' buttons.

#2: primary-buttons-2030631-1.patch queued for re-testing.

Status:Needs review» Reviewed & tested by the community

StatusFileSize
new1.11 MB

RTBC++

Screen Shot 2013-09-22 at 15.16.09.png

Status:Reviewed & tested by the community» Fixed

Committed and pushed to 8.x. Thanks!

Status:Fixed» Closed (fixed)
Issue tags:-Usability, -Novice

Automatically closed -- issue fixed for 2 weeks with no activity.

Issue summary:View changes
Issue tags:+Usability, +Novice

...restoring tags eaten by the tag monster.