I was having the same issue. I set the Mail Rule in OmniFocus to process subjects starting with "--" and archive the messages into a Mail folder called "OmniFocused". The emails were marked read and filed into the OmniFocused folder, but the action(s) never showed up in my OmniFocus inbox.
The solution turned out to be pretty simple in my case. Adding a space between the "--" and action title in my message subject caused the actions to be created in OmniFocus. i.e. - "
-- my action" = good; "
--my action" = bad
In the body of the email message, having the space after the "--" did not have any affect for additional actions. However, there did need to be at least one blank return line between actions. i.e. - this i okay for the message subject:
--my first action
-- my second action
This was on Mac OS 10.4.11 with OmniFocus 1.0.1 sneakypeek (v77.1.3.0.97557), with the Mail Clip-O-Tron 3000 enabled.
Here is the error printed to the Console when the subject line didn't have the space after "--" or if there wasn't a blank line between message body actions:
Code:
2008-02-09 14:21:47.360 Mail[2032] NSExceptionHandler has recorded the following exception:
WebKitThreadingException -- +[DOMDocument(WebCoreInternal) _wrapDocument:] was called from a secondary thread
Stack trace: 0x96a28f10 0x92c00db8 0x9628bcd8 0x95f460c4 0x939b1c0c 0x939b1350 0x939b08b8 0x939af01c 0x9b6b99b8 0x92c431fc 0x92c7ca98 0x92c7c424 0x92c7bfb0 0x92c7bc0c 0x92c79310 0x92be6a10 0x92be6870 0x91500960 0x9150bfc0 0x915048f8 0x915043d4 0x9334b8d4 0x99afdd60 0x930dac5c 0x99afdd2c 0x99b3a708 0x99b5cfd8 0x99b52640 0x99b6ac84 0x99b6ad0c 0x99b51e70 0x99b693cc 0x99b694dc 0x99b65c3c 0x99b3d0a0 0x99b3e910 0x99b208c8 0x90bdf074 0x99af4418 0x90bdebb8 0x99af3694 0x99af32e4 0x90bdebb8 0x930ef878 0x92ce2970 0x9b6aadf0 0x9b6aa920 0x9b65dc24 0x9b64c7cc 0x9b64c630 0x9b64bb98 0x9b64b4d8 0x9b5f54ec 0x9b5f4c38 0x9b5e491c 0x9b6c8330 0x9b60d0c8 0x90a461f4 0x92be1bb4 0x9b5d9840 0x9b5e2ec0
2008-02-09 14:21:47.360 Mail[2032] +[DOMDocument(WebCoreInternal) _wrapDocument:] was called from a secondary thread
Hope this is helpful to others,
sean