We recently upgraded to TeamSite 7.5 (Red Hat) and users are complaining that the import functionality has significant delays. We're not seeing any errors or warnings. Also we're using IE 11 and Java 8 Update 66.
Cannot say that I have noticed any difference.
Could be Java related (Java 8 wasn't supported) Could be IE is a pig.
Have you confirmed it ? Have you checked event view to see if local Java reports anyting ?
Can you articulate how long it takes ? Maybe there is a timeout being reached and hten it starts,
