After updating from firmware version 1.11 (2011-05-24) to 1.12 (2011-07-20) I found that the camera no longer worked in IE. It would constantly try to install the ActiveX control and then claim it wasn’t installed. After a large amount of digging, I found C:\Windows\Downloaded Program Files\IPCamPluginTMPT.ocx on my computer, properties of this file indicate it was version 1.0.0.10. I also found http://IP.ADDRESS/IPCamPluginTMPT.cab on the device and upon extraction, version indicates 1.0.0.12. And finally, at http://IP.ADDRESS/camera.asp you can view source and see some code which appears to be checking for version 1.0.0.10 of the ActiveX control.
var activexVersion = "1,0,0,10";
I fixed it by forcing the registration of the older ActiveX control which I had found and copied by sheer luck. I tried forcing the 1.0.0.12 client installation, but of course this didn’t work. I believe the real fix is for Edimax to update the version check in camera.asp and I’ve emailed them, but in the hopes of saving someone time I have posted my fix.
Removal:
C:\Windows\system32>regsvr32 "C:\Windows\Downloaded Program Files\IPCamPluginTMP
T.ocx" /u
Install:
C:\Windows\system32>regsvr32 "C:\Windows\Downloaded Program Files\IPCamPluginTMP
T.ocx"