A couple things i've noticed.
For some reason you can't view the created threads of certain users. An example being:
http://www.sythe.org/members/329175-hey-i-m-zac.html
The error received:
http://prntscr.com/89n1gm
I clicked the notify the administrator thing and sent in a report about it but that was at the beginning of 2015 and it's still happening soo.
Also if you use the 'Insert Link' option too many times then eventually it glitches out. I'm not sure if it's specific to the amount of links on one page or just in one post. It's mainly shown here:
http://www.sythe.org/market-discussion/1653933-known-skype-scammers-do-not-trade-list.html
Where there's quite a large amount of skypes not to trade with linked to their associated report whether it be on Sythe or offsite. I posted about this a while ago as well and Roary and I talked about it for a bit, he suspected it was only skypes with dots in them as part of a system that was put in place to prevent making website links appear as those of other websites, but many skypes with dots in them appear fine, and it also happens to skypes that don't have periods in them but colons as well.
Edit: Found proof of another small bug that I discovered a while ago but couldn't get any proof of.
I discussed this with Roary as well and it's not really an important glitch but yeah. Some older posts you/others have made don't update to include their current signature. The only proof I could find of this before was an archived report but Roary said it was because of that specific section. However it does happen outside of the section as well.
http://www.sythe.org/14487899-post254.html
http://prntscr.com/8b25qh
http://prntscr.com/8b25wn
As you can see Yaan Li's older post hasn't updated to include his current signature. Many old posts do update in this manner, it does not seem to be specific to certain sections, certain users, or even certain threads. It's quite odd.