diff -pruN qcomicbook-0.4.0/src/imgarchivesink.cpp qcomicbook-0.4.0-1jr/src/imgarchivesink.cpp
--- qcomicbook-0.4.0/src/imgarchivesink.cpp	2007-11-05 19:34:23.000000000 -0200
+++ qcomicbook-0.4.0-1jr/src/imgarchivesink.cpp	2009-07-21 23:39:51.000000000 -0300
@@ -311,7 +311,17 @@ void ImgArchiveSink::extractStdoutReady(
 		if (b[i] == '\n' && extcnt < filesnum)
 			++extcnt;
 	emit progress(extcnt, filesnum);
-	qApp->processEvents();
+
+// This is called from inside QProcess::waitForFinished(int), which will be
+// polling for input from the process pipes. If we process events here,
+// the process will finish and all its descriptors will be closed, putting
+// waitForFinish into an infinite select with no descriptors to monitor.
+// The Qt4 documentation doesn't say if this should be allowed, it may be a
+// Qt4 bug. For now, suppress processing events here. The UI won't be
+// updated while loading the archive.
+//   -- jravasi 2009-07-21
+//
+// 	qApp->processEvents();
 }
 
 void ImgArchiveSink::autoconfRAR()