I'm unsure if this is relevant to your problem but I'll say it just in case:
On this westinghouse I have 3 digital inputs, dvi1 (chipset1), dvi2 and hdmi(shared chipset2).
On dvi 1 the regular detected 1920x1080 works fine. On dvi2 and hdmi the res gets side stepped up by a single 1 pixel row. The 'missing' pixel area just shows random colors, probably shared to one of the adjacent pixels.
The way I found to fix it was to redefine 1920x1080 as a custom resolution. The autodetect puts Horizontal sync width at 44,
Horizontal sync polarity as + and Vertical sync polarity as -. After using powerstrip I found that if I put 43 + + instead, the problem line was fixed.
Maybe a similar slight adjustment might help you, though I'd recommend using powerstrip instead of trying numbers manually yourself.
well thats kind of a complex resolution for this matter ... the problem here is we're just talking about Teamspeak .. so remote diagnostic and help is a tricky thing - even more when the guy who needs help doesnt know that much about computers :/
btw does this customizing may damage the monitor? if not i will try it out perhaps