Okay, I did change the behaviour alot back then. Sorry about that newt.
The explanation for the cause of the bug is something like this (also how I handled this special case)
The reverse action is no longer 'rewind' action since 1.5, that's why it broke.
To fix it, I added the rewind/reverse combo to set which action will be performed when we do Reverse. The default is 'Reverse' tho, so that it won't break up many other ppl who use this plugin since 1.5. But in your case or any other who came before 1.5, you can use 'Rewind'. It works quite the same with the previous version...
Very sorry for the inconvenience... :(
PS: I already uploaded the 1.5.3 version. Could you please test it and tell me if it work for you?