I have no problems with the application itself. The problem is with the notification emails I receive.
Over the last week the emails I get from twitter are not viewable in html on my Bold 9900. All o/s is up to date as is the application itself, not that I think it matters with email notifications.
When someone retweets one my tweets, I get an email stating "@ ... has retweeted one of your tweets" but normally where I would see images in the body with the actual tweet that was sent out, I see nothing but a white screen. This is also true for any other email notifications from twitter such as replies, mentions or new followers.
Setup your email account to get NOT use HTML format mail.
go into the Messages app, hit menu, and select Options. The second choice is Inbox Management. Click that and you’ll get a list of all accounts associated with your device.
Pick your email and change it to HTML only.
This seems to work for SOME Twitter emails. Retweets are legible, Favoriteds are not.
I had the same issue for well over a month now. Sometimes they're viewable but most times not it seems random. I just view in plain text and read through the html. It sucks.