There was a rather interesting set of events in Daraa, Sheikh Al maskin as the Syrian army, Hezbollah and various Iraqi shia militias under the joint control of Syrian and Iranian officers have conquered parts of this little town which in itself has little importance but which leads to Al Sihailiah where it is said to host the biggest storage facilities of ammunition and weapons in the entire region. At first the Syrian-Iranian forces gained the upper hand with the help of Russian air strikes and managed to drive the various islamists factions out of most of the town, which in turn drove the islamists factions to unite, pour in numbers into the battlefield and manage to retake a lot of their lost neighbourhoods.
The interesting part, and its based on sources which have so far proven very knowledgeable but are not confirmed so take it with a pinch of salt (No citation to provide, sorry); The commanding HQ of the 5th division that is in charge of managing this campaign and which in theory is a joint force of Syrian and Iranian officers, is in reality totally controlled by the Iranians as they do not trust the Syrians to the point where they moderate them out of vital information. apparently, an argument in that HQ got so heated up that a Syrian officer shot to death an Iranian officer and in return got immediately executed by the Iranians, this got the Syrians pretty angry to the point where they are not willing to fight alongside the Iranians/Iraqis/Hezbollah in that campaign anymore. ever since that set of events, the rebels are getting the upper hand.
Whether that incident spills to the rest of Syria is yet to be seen, but this is not the first time i have seen reports that the Syrians are not too happy with their new Iranian overlords because, as opposed to the Russians which the Syrians greatly prefer and which are far more pragmatic and couldn't give a damn about the subtle differences between a various Islamic sect to another, the Iranians look down on the Alawites for being "lesser Shiites" and treat them accordingly.