I've run into an issue this morning where I am getting a fatal error in the Incoming Links dashboard widget in the latest nightly version of 3.0-Alpha:
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 122880 bytes) in /home/xxx/public_html/xxx/wp-includes/class-simplepie.php on line ....
Update: Getting same fatal error in the WordPress Development Blog widget, Plugins widget, and the Other WordPress News widget is empty.
I didn't include the line number as it changes depending on how many of the above-listed dashboard widgets I have activated.
FYI, my host's temporary memory limit is set to 64M.
Not sure anything can be (or should be) done about this, but wanted to post it in case someone else has a similar issue.