I am having the same problem with a one page form, it has some simple scripting in it but it takes on average 5 to 7 seconds to tab to the next field in adobe reader and even in the preview through lcd. I had a huge array with over 5000 elements but after I removed that it still takes the same amount of time to tab between fields.
From the XML Source...<br /><br />I did find this one line of code that is repeated in every field between the border tags.<br /><br /><?templateDesigner StyleID aped2?><br /><br /><field name="DefCitizenship" w="38.1mm" h="10.876mm"><br /><ui><br /><textEdit hScrollPolicy="off"><br /><border><br /><?templateDesigner StyleID aped2?><br /></border>
No, all the lines are unique.. It's a multi-form.. so it has about 15 (subforms) in the form but the presence changes based on a dropdown list (invisible to visible). I could understand the original load was taking a little time but everytime I interact with any object it lags. Is there something I can do to test it out?
It is a confirmed bug and will be fixed in a future release. Your corrective action of remove the lines is correct but in some cases there are too many to deal with. I have a style sheet that can be applied to delete all of those lines and all is OK again.