From time to time, one of my filesystems fills up and the merge of a package aborts. After resizing the FS, I can retry the merge with "ebuild <whatever> qmerge". But if I run "ebuild <whatever> merge" instead (as I'm used to due to FEATURES=collision-protect and FEATURES=test), the installation routine will be re-run, which can take quite some time (e.g. KDE) or even require a set of CDs to be inserted (some games). In other words, it's quite expensive. It would be nice if ebuild would skip install after it has successfully completed, like it does for unpack and compile.
This is fixed in svn r3646.
This has been released in 2.1.1_pre1-r3.
Thanks!