I'm using OpenERP 7 with the latest updates pulled via bzr. For the past several weeks, there's been this extremely irritating error on Accounting / Journal Entries. I go to enter a new Journal Entry, select Journal, etc. Then click "Add an item" and add the first item. When I tab through all the fields, I get the following error:

Uncaught TypeError: Cannot read property 'id' of null

Click OK. Then get the following:

Uncaught Error: Object can not be converted to JSON

Click OK again. Then I get back to Journal Entry, but the page is frozen.

Or if I click "Add at item" the second time instead of tabbing, it just goes straight to:
Uncaught Error: Object can not be converted to JSON

Click OK. Then I'm back to the Journal Entry page, but again it's frozen.

Then if you click the "Save" button, the record is saved. Click "Edit" and you can add the second Journal Entry to balance the record. It's a Grade A hassle.

Any other users have this problem? Is this a bug in OE, and if so, should I submit a bug report?