nautilus-2.5.6 "no action associated"

[Michael Jonsson <micke lmpnet se>]

After upgraded from nautilus-2.5.5 to nautilus-2.5.6 I lost all file 
associates (test, conf, zip, desktop).

Then I try to open a text file I get a pupup window, "There is no action 
associated with "test.txt."
If I click on the "Associate Application Button", the program quits 
unexpectedly....

.M