We have released a new version which fixes the bug introduced by 1.0.11.

If you have already upgrade to 1.0.11:

Upgrade to 1.0.11.1, or any subsequent release (including 1.0.12 due out tomorrow).

If you haven't yet upgraded to 1.0.11:

Skip the 1.0.11 release, and upgrade directly to 1.0.11.1, or any subsequent release.

Here's the changelog:

Release 1.0.11.1 (23 May 2011):
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Bug fixes:
    8310    Course enrollments broken                                                           Caused by an unrelated fix in a previous release
    8310    Revert change "Forms behave unexpectedly when file uploads exceed post_max_size"
    8069    "Complete" column in completion reports sometimes blank
    6710    Miscellaneous language string fixes                                                 For better cross-language supportWe have released a new version which fixes the bug introduced by 1.0.11.