I am having the same exact problem with ie8 which displays an error message with the following discription

##########################
"Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)
Timestamp: Wed, 22 Jul 2009 21:09:59 UTC


Message: Object expected
Line: 1
Char: 1
Code: see more 0
menu_compose.js"
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this problem occurs on all the browsers I have no matter what version.

I did not install dolphin on the www/root but on a subfolder, which I do not think would affect butis worth letting know.
please let us know a solution
thanks