i think i know what ur talking about

like u load a new tab and then ur just browsing one tab and then when u try to switch to the other tab it doesnt go

it seems to happen if u have like a flash video or something playing. like if im on youtube and i have a video playing it kinda lags when i try to switch to a new tab, and if u have alot of tabs open it sometimes doesnt even go

so i just click that down arrow all the way on the right and it shows the drop down list of all tabs and u can just pick from there