The Strata Corporation insurance will never cover upgrades inside the your unit, your condo insurance, if you bought the coverage, will take care of that. I'm with BCAA and I have a specific clause in my contract that takes care of any upgrades (hardwood floors, etc.)
Where the pipe burst and how will determine who will get charged. If it's within the walls and the pipes were just defective, then the Strata's insurance will pick up the tab and hopefully has enough coverage for the repairs, since plumbing fixtures within the walls are considered common property. If they find the owner upstairs at fault, they can charge back the deductible and all costs to that owner.
You will have to cover your own deductable for the meantime until the Strata Corporation does it's full investigation.
Just FYI, make sure your own condo insurance policy has enough contingency coverage. For instance, your Strata Corporation's deductable could be $15,000. If you ever caused something to break and it damages common area, they can charge back the deductable to you. So make sure your policy can match that deductable. I had to pay more for the coverage, but it's well worth it.
For any more information regarding Strata Corporation insurance and Strata lot insurance, follow this link.
http://www.choa.bc.ca/_members/_pdf/..._June_2011.pdf
I've been on numerous strata councils and most people are sorely under-insured or not even insured.