I had configured exchange account and IMAP account. IMAP account was disabled
and exchange account was enabled.
For some testing purpose disabled exchange account and enabled IMAP account. 
Typed password as well, after that i can see the folders in my account and
number of unread mails in them but summary view of mails is not displayed.
Restarted evolution, could see the mails. Attached stack trace when none of the
mails was displayed.

Traces in terminal from where evolution was launched.

raja@linux:~> evolution
adding hook target 'source'
priv (MemosComponentnPrivate) == 0x8135e88

(evolution:3195): Gdk-CRITICAL **: gdk_gc_set_foreground: assertion `GDK_IS_GC
(gc)' failed
BBDB spinning up...

(evolution:3195): Gtk-CRITICAL **: gtk_entry_set_text: assertion `text != NULL'
failed

(evolution:3195): Gtk-CRITICAL **: gtk_tree_sortable_set_sort_column_id:
assertion `GTK_IS_TREE_SORTABLE (sortable)' failed

(evolution:3195): Gdk-CRITICAL **: gdk_gc_set_foreground: assertion `GDK_IS_GC
(gc)' failed

(evolution:3195): Gtk-CRITICAL **: gtk_entry_set_text: assertion `text != NULL'
failed

(evolution:3195): Gtk-CRITICAL **: gtk_tree_sortable_set_sort_column_id:
assertion `GTK_IS_TREE_SORTABLE (sortable)' failed

(evolution:3195): Gdk-CRITICAL **: gdk_gc_set_foreground: assertion `GDK_IS_GC
(gc)' failed

(evolution:3195): Gtk-CRITICAL **: gtk_entry_set_text: assertion `text != NULL'
failed

(evolution:3195): Gtk-CRITICAL **: gtk_tree_sortable_set_sort_column_id:
assertion `GTK_IS_TREE_SORTABLE (sortable)' failed

(evolution:3195): Gdk-CRITICAL **: gdk_gc_set_foreground: assertion `GDK_IS_GC
(gc)' failed

(evolution:3195): evolution-mail-CRITICAL **: em_folder_tree_model_remove_uri:
assertion `uri != NULL' failed

(evolution:3195): camel-WARNING **: camel_exception_get_id called with NULL
parameter.

(evolution:3195): camel-WARNING **: camel_exception_get_description called with
NULL parameter.

(evolution:3195): camel-WARNING **: camel_exception_get_id called with NULL
parameter.

(evolution:3195): camel-WARNING **: camel_exception_get_id called with NULL
parameter.



Stack traces of evolution

(gdb) thread apply all bt

+ Trace 64321

Not reproducible always.