Fedora Core FC5
pgadmin3 1.4.2 (Mar 25 2006) installed by rpm. Same behavior with 1.4.1.

After reading some postings, installed gtk-qt-engine-0.60-8 via rpm, did not help

Bug is trivial to reproduce: click on help ? in toolbar or select Help|Bugreport
from menu. I'm sure there are other ways to crash as well.

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i have install it (pgAdminIII) on Fedora 4 and i have the same
probleme.(segmentation fault)
I resolve this by installing wxGTK, wxGTK-devel (via rpm)