I have a free shipping price rule which is configured like this:
Try again if the rule is applied and let us know.
If we are talking for Magento CE 1.9 and above, the code is corrected as long as the database is concerned but you might encounter the same problem! If so, then there is another cause.
One also usual bug is * user not being able to update the cart quantities* or users not able to login. This has to do with formKey and the answer that was given here.
Apparently, the same solution fixes the problem of vanished shipment or payment method after applying a coupon, that we are discussing here.
Hope this helps users of newer versions...
so be it - manemoi
Apparently Magento does not care about other shopping cart price rules if there is a valid coupon code entered in the Front-end.
Fix for this issue is in the comments of the following website: http://magentoexpert.com/issue-with-cart-price-rules-coupon-code-discard-promotion-without-coupon-code/
As suggested in one of the comments it's best that you try and convert the current rule into a "Shopping Cart Price Rule".
In a Shopping Cart Price rule you can also set conditions that depend on the subtotal of the cart, the shipping region, shipping country, ...
In the action tab you can easily Free shipping option to "For shipment with matching items"
This should solve it ;)