I did the update, too.
Now mails from gmail.com aren't displayed anymore.
the mails are looking like a 0 byte message even if they 7K big.
If I press reply, the mail is quoted and readable. The mail seems to look fine, no html or whatever.
How to debug this? (There is no error in error-console of firefox 3
When I open the mail in thunderbird it is readable.
This an roundcube issue, I think. Hans, are You involved in the Roundcube dev team?