[Evolution] evolution freezes on some xml attachments

[Eugene Kanter <eugene bct bz>]

Recently I noticed that I am unable to open messages with attached xml 
files. UI completely freezes.
"Retrieving message" is displayed in status bar. Process "evolution" 
does not respond to SIGINT.
Strace shows some threads are active, but not much activity overall, 
mostly poll().
Watching for several minutes I noticed several read/write with xml 
attachment fragments.
Overall CPU activity is negligent, ps shows zero CPU utilization by 
evolution.
Eventually the UI came back to life, but every time I select the message 
it freezes again.

Any ideas how to debug this anomaly?

evolution-3.10.4-2.fc20.x86_64

Eugene.