Safari not including #node+webformID in URL

Hi, Ive got a node with HTML content divided into little subsections using some jquery tabs. When clicking on one of those tabs, a webform is shown. The original webform node is converted into a block (using the webform block module) and then that block is inserted using a typical PHP snippet that calls the block.

Now, when I get validation errors or a confirm message, I detect what is shown in the URL (with javascript) and if I find the webform id, then I show the proper content (the tab with the webform).

My problem is that Safari doesnt show the #node+webformID in URL when the form is sent. It does show it properly when there are validation errors.

Any idea what I could do about this? My boss is impatient so we're gonna have to go live without it but Id like to find a solution ASAP.

Thanks y'all!