Lax,

I noticed something similar when I was testing out DAOC with IS. I hadn't gotten a chance to run it down fully, but this is what I was seeing specifically:

I had an key defined to send "CTRL+SHIFT+#" to all others, where the # varied from 1 to 4 for 4 different actions. I then set each of these up as a key action to be performed when I changed focus to a character's window (CTRL+SHIFT+1 for character 1, CTRL+SHIFT+2 for character 2., etc.) This, in DAOC, is supposed to change the quickbar displayed. Instead, I noted that as I switched characters, my other characters were trying to cast (activate items in the qucikbar). When I looked into it a bit more, I noted that when I'd shift to another IS session, the other sessions were all receiving a double-press of whatever the # was (with no CTRL or SHIFT modifiers).

I chalked it up to being a DAOC/directinput7 issue, and figured it'd be a bug report to give you when I had a bit more time to do more testing. The OP's issue seems like it may be related, so I wanted to include my report here also, for you.

J