Anyone else having trouble using Overdrive on a Sony reader?

I posted about in the ongoing Overdrive thread in case this was a general problem with Overdrive, but nobody else has posted about it so I guess not. I thought I'd try in the Sony forum in case this is a Sony-specific issue.

A few days ago I tried using the new Overdrive on my Sony reader and it worked OK - I was able to log in and view my wishlist.

Here's what started yesterday:

When I entered my password and tapped to sign in, the status bar at the top would get most of the way across and then I would get booted out of the browser altogether - it would send me back to page 2 of the reader's main menu. This happened repeatedly.

I tried googling the library (on the reader). When I clicked on the search result for the library's home page, I got booted out of the browser again.

I tried googling again and one of the search results was a link to the library's Advanced Search page. I clicked on that link and it came up ok. From that page, I clicked sign in, it let me sign in and returned me to the Advanced Search page. I was able to click My Account, but when I selected Wishlist I got booted out of the browser again.

I reopened browser and used the history listings to go back to the Advanced Search page. Found I was still signed in. Clicking on the bookshelf icon got me booted out of the browser again.

Went back in via Advanced Search, then the library's menu button, then subjects, selected a subject and was able to see some books. From that page, I clicked on the bookshelf icon and got booted out of the browser again.

I ccould search and browse and access my account settings, but if I tried to access my loans, holds, or wishlist, I got booted out.

As of today it's showing me as still signed in, and I can't sign out - when I try it boots me out of the browser again.