URL Logo Issue

If you can install/run a client side capture utility like Fiddler or HTTPWatch, take a look at the HTTP responses through the LTM. The reference URL for the logo image will be in the corresponding HTML page. If you're not seeing the logo through the LTM, there's a very good chance that the URL being sent to the client is not congruent with the URL you use to access the site through the LTM (ex. internal URL, http:// vs. etc.). Once you know what that URL looks like, you can create an iRule to rewrite it correctly.