User blog comment:Suparockr/List of Plotholes throughout the series/@comment-1679409-20120717153223/@comment-24174486-20120718015033

"And just for your information I played through the whole trilogy multiple times and I'm pretty sure that I didn't miss any of the answers to the things I wrote here."

Well, for one: "2) How did Javik survive and but his fellow protehans didn't."

http://masseffect.wikia.com/wiki/Javik#Dossier

Also, if you've played through the trilogy multiple times, you would know that Liara has the Electronics talent in ME1. And if you've chosen Vega to do repairs, you'd know that it's played for laughs: he gets it working by simply kicking it.