I had some very annoying bugs/glitches/errors involving MGS software, and what cured most of them was a savage cache clearing frenzy, all 3 browsers I use - Opera, FF, IE - Temporary Internet Files, Cookies, History, removed outdated plug-ins, add-ons etc also . Then I completely removed all Java flash player related stuff (remnants of older versions can cause havoc, these include plug-ins etc), and used the thorough cleaner you d/l from their site, I then cleared the Java console cache, this worked wonders and instantly cured the many script related errors I had at various MGS casinos.
I also use a multi version flash player as some casinos have never updated parts of their main websites and this can cause problems, a great example here is Ladbroke`s and their banking page in the d/l version, Betway, Gnuf etc are the same, and not forgetting that some older games have flash based feature rounds (this aspect involves other software providers - Cryptologic springs to mind and the software that the English Harbour group used to use - Vegas Technology IIRC).
Also, making sure your security suite recognises MGS as a trusted application some are pretty thorough and will block certain aspects of Viper software (port forwarding etc can help loads here), even browser related security software can cause heaps of problems.
I know these remedies are centred more around script errors and flash based MGS gaming, but I see several people complaining about these also so I thought I would share how I cured them. I used to suffer serial disconnections when playing at 32Red and co, and since I done all the above, this aspect has also been conquered .
During sex, I stopped, she said "What you stopped for?", I said "Ssh, I saw this on porn tube, it's called buffering".