just FYI, for those arriving here via Google or the local search:
as of today (2016-07-05), I am still getting this errant behavior (title image only looks like "@-") on the latest imagemagick package update available from standard repositories with Ubuntu 16.04 (which is "8:184.108.40.206-7ubuntu5.1").
to get the error out, and after struggling for hours with incorrect docs online, and dependency / delegate issues for PNG, I finally was able to re-compile my own .deb file of ImageMagick-7.0.2-2, using "andrew.46"s answer at
http://askubuntu.com/questions/745660/i ... l-problems
but even that was not quite right:
- i still had to run "./configure" before "make"
- i had to run "sudo ldconfig -v" afterwards to get newly-installed libraries recognized
once my 7.0.2-2 version of ImageMagick was installed, the label:@- works perfectly again.
also, i noticed today that a new imagemagick package came down from Canonical, which replaced my 7.0-based imagemagick .deb with an older buggy version (the one listed above) again. grrrr... so apt will not let me simply reinstall the .deb i built, replying with, "A later version is already installed", even though that "later" version is based on 220.127.116.11-7, and i am trying to install a .deb i made based on 7.0.2-2. *Sigh*. so -- being a neophyte regarding apt -- i was able to get things back to 7.* by re-running checkinstall (as per the help page above) and to rebuild and re-install my custom .deb package. i guess i'll have to do this whenever a new .deb comes down from Canonical -- until this bugfix propogates through to the repos.