Sametime is an instant messenger from IBM/Lotus which is used in many organizations as the chat application on the intranet.
Akhilesh pinged me today as he was unable to launch sametime meeting. Sametime would error out with browser error code -11. I googled for this and found the answer in Sametime forums. The problem occurs if you have changed your default browser from Internet Explorer to something else, say Firefox. Since older versions of sametime do not work with firefox browser, they complain about it by throwing browser error code -11. If you reset your default browser as Internet Explorer, then the problem is resolved. To do this, open Internet Explorer - Tools menu - Internet Options - Programs tab. Here you'll find options to make IE the default browser. In IE7 you have a Make Default button and in IE6 there is a checkbox for checking whether IE is the default browser every time it is started. Use these options to make IE the default browser. Try launching the sametime meeting after you have made IE the default browser.
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